(3-spiro-[2'-N-oxyl-3',3'-dimethyloxazolidine])-5α-cholestane | 18353-76-9

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: (3-spiro-[2'-N-oxyl-3',3'-dimethyloxazolidine])-5α-cholestane
• 英文别名: 3β-doxyl-5-α-cholestane；3β-doxyl-5α-cholestane；5-doxylstearic acid；4',4'-dimethyl-spiro[cholestane-3,2'-oxazolidin]-3'-yloxyl
• CAS: 18353-76-9
• 化学式: C₃₁H₅₄NO₂
• 分子量: 472.775
• InChiKey: ODDFHESUNMAHDN-LJGTUOGHSA-N

物化性质

• 熔点：
  178-183 °C
• 稳定性/保质期：

  遵照规定使用和储存，则不会分解。

计算性质

• 辛醇/水分配系数(LogP)：
  9.8
• 重原子数：
  34
• 可旋转键数：
  5
• 环数：
  5.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  13.5
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 安全说明：
  S24/25

SDS

Name:	3-Doxyl-5-Alpha-Cholestane Free Radical 98% Material Safety Data Sheet
Synonym:	None known
CAS:	18353-76-9

Section 1 - Chemical Product MSDS Name:3-Doxyl-5-Alpha-Cholestane Free Radical 98% Material Safety Data Sheet
Synonym:None known

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Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS

CAS#	Chemical Name	content	EINECS#
18353-76-9	3-Doxyl-5-Alpha-Cholestane	98	unlisted

Hazard Symbols: None Listed.
Risk Phrases: None Listed.

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Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
The toxicological properties of this material have not been fully investigated.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation.
Ingestion:
May cause irritation of the digestive tract. The toxicological properties of this substance have not been fully investigated.
Inhalation:
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
Chronic:
No information found.

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Section 4 - FIRST AID MEASURES
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
Ingestion:
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

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Section 5 - FIRE FIGHTING MEASURES
General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Extinguishing Media:
Use agent most appropriate to extinguish fire. Use water spray, dry chemical, carbon dioxide, or appropriate foam.

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Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions.
Provide ventilation.

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Section 7 - HANDLING and STORAGE
Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Storage:
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep refrigerated. (Store below 4C/39F.)

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Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 18353-76-9: Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant respirator use.

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Section 9 - PHYSICAL AND CHEMICAL PROPERTIES

Physical State: Solid
Color: yellow
Odor: none reported
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 177.00 - 179.00 deg C
Autoignition Temperature: Not applicable.
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density:
Molecular Formula: C31H54NO2
Molecular Weight: 472.76

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Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, dust generation, excess heat, strong oxidants.
Incompatibilities with Other Materials:
Oxidizing agents.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
Hazardous Polymerization: Has not been reported

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Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 18353-76-9 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
3-Doxyl-5-Alpha-Cholestane - Not listed by ACGIH, IARC, or NTP.

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Section 12 - ECOLOGICAL INFORMATION

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Section 13 - DISPOSAL CONSIDERATIONS
Dispose of in a manner consistent with federal, state, and local regulations.

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Section 14 - TRANSPORT INFORMATION

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

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Section 15 - REGULATORY INFORMATION

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
Safety Phrases:
S 24/25 Avoid contact with skin and eyes.
S 28A After contact with skin, wash immediately with
plenty of water.
S 37 Wear suitable gloves.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 18353-76-9: No information available.
Canada
None of the chemicals in this product are listed on the DSL/NDSL list.
CAS# 18353-76-9 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 18353-76-9 is not listed on the TSCA inventory.
It is for research and development use only.

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SECTION 16 - ADDITIONAL INFORMATION
N/A

制备方法与用途

制备方法：自旋标记。

用途简介：

用途：自旋标记。

反应信息

• 作为反应物：
  描述：

  (3-spiro-[2'-N-oxyl-3',3'-dimethyloxazolidine])-5α-cholestane 在 sodium metabisulfite 作用下， 以40 mg的产率得到3-doxyl-5α-cholestane nitroxide
  参考文献：
  名称：

  Inhibition of in vitro lipid peroxidation by stable steroidic nitroxyl radicals

  摘要：

  4',4'-dimethylspiro (5 alpha-cholestane-3,2'-oxazolidin)-3'-yloxy (IK-1) and 7 alpha,12 alpha-dihydroxy-4',4'-dimethylspiro (5 beta-cholan-24-oic-3,2'-oxazolidin)-3'-yloxy acid (IK-2), two stable steroidic nitroxyl radicals, were newly synthesized and tested as possible inhibitors of lipid peroxidation, induced by. Fenton's reagent in both rat liver microsomes and egg phosphatidylcholine liposomes. The inhibitory activity, evaluated through the formation of thiobarbituric acid reactive substances (TBARS) and the conjugated diene, was compared with that of alpha-tocopherol and 2,2,6,6-tetramethylpiperidine-1-yloxy (TEMPO). In each model system IK-1 and IK-2 exhibited an IC50 of 8 mu M and reduced the formation of TBARS and conjugated diene, showing IK-1 a potency comparable to alpha-tocopherol and higher than TEMPO. Moreover IK-1 and, to a lesser extent IK-2, reduced the lipid peroxidation induced in the microsomes by the water-soluble azo-initiator 2,2'-Azobis (2-methylpropionamidine) dihydrochloride (AMPH), indicating the IK-1 and IK-2 ability as chain-breaking antioxidants. The hydroxylamine 4',4'-dimethylspiro (5 alpha-cholestane-3,2'-oxazolidin)-3'-hydroxide (IK-3), obtained by chemical reduction of IK-1, was completely inactive as an inhibitor of lipid peroxidation in heat pre-treated microsomes and in liposomes. However in microsomes it was active since it was oxidized to the corresponding nitroxyl radical IK-1. (C) 1997 Elsevier Science Ireland Ltd.

  DOI：

  10.1016/s0009-3084(97)00052-2
• 作为产物：
  描述：

  4',4'-dimethyl-spiro(5α-cholestane-3,2'-oxazolidine) 在 间氯过氧苯甲酸 作用下， 以 乙醚 为溶剂， 反应 2.0h， 以68%的产率得到(3-spiro-[2'-N-oxyl-3',3'-dimethyloxazolidine])-5α-cholestane
  参考文献：
  名称：

  Inhibition of in vitro lipid peroxidation by stable steroidic nitroxyl radicals

  摘要：

  4',4'-dimethylspiro (5 alpha-cholestane-3,2'-oxazolidin)-3'-yloxy (IK-1) and 7 alpha,12 alpha-dihydroxy-4',4'-dimethylspiro (5 beta-cholan-24-oic-3,2'-oxazolidin)-3'-yloxy acid (IK-2), two stable steroidic nitroxyl radicals, were newly synthesized and tested as possible inhibitors of lipid peroxidation, induced by. Fenton's reagent in both rat liver microsomes and egg phosphatidylcholine liposomes. The inhibitory activity, evaluated through the formation of thiobarbituric acid reactive substances (TBARS) and the conjugated diene, was compared with that of alpha-tocopherol and 2,2,6,6-tetramethylpiperidine-1-yloxy (TEMPO). In each model system IK-1 and IK-2 exhibited an IC50 of 8 mu M and reduced the formation of TBARS and conjugated diene, showing IK-1 a potency comparable to alpha-tocopherol and higher than TEMPO. Moreover IK-1 and, to a lesser extent IK-2, reduced the lipid peroxidation induced in the microsomes by the water-soluble azo-initiator 2,2'-Azobis (2-methylpropionamidine) dihydrochloride (AMPH), indicating the IK-1 and IK-2 ability as chain-breaking antioxidants. The hydroxylamine 4',4'-dimethylspiro (5 alpha-cholestane-3,2'-oxazolidin)-3'-hydroxide (IK-3), obtained by chemical reduction of IK-1, was completely inactive as an inhibitor of lipid peroxidation in heat pre-treated microsomes and in liposomes. However in microsomes it was active since it was oxidized to the corresponding nitroxyl radical IK-1. (C) 1997 Elsevier Science Ireland Ltd.

  DOI：

  10.1016/s0009-3084(97)00052-2