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3,6-二氢-4,6-二甲基-2-苯基-2H-吡喃 | 68039-41-8

中文名称
3,6-二氢-4,6-二甲基-2-苯基-2H-吡喃
中文别名
——
英文名称
6-phenyl-2,4-dimethyl-5,6-dihydro-2H-pyrane
英文别名
2H-Pyran, 3,6-dihydro-4,6-dimethyl-2-phenyl-;4,6-dimethyl-2-phenyl-3,6-dihydro-2H-pyran
3,6-二氢-4,6-二甲基-2-苯基-2H-吡喃化学式
CAS
68039-41-8
化学式
C13H16O
mdl
MFCD00169846
分子量
188.269
InChiKey
SQVJYNSGAXORSQ-UHFFFAOYSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

物化性质

  • LogP:
    3.800 (est)

计算性质

  • 辛醇/水分配系数(LogP):
    2.6
  • 重原子数:
    14
  • 可旋转键数:
    1
  • 环数:
    2.0
  • sp3杂化的碳原子比例:
    0.384
  • 拓扑面积:
    9.2
  • 氢给体数:
    0
  • 氢受体数:
    1

反应信息

  • 作为产物:
    描述:
    2-甲基-1,3-戊二烯苯甲醛 在 palladium(II)[(1,3-bis(diphenylphosphino)propane)(C6H5CN)2]*2BF4 作用下, 以 氯仿 为溶剂, 反应 20.0h, 以72%的产率得到3,6-二氢-4,6-二甲基-2-苯基-2H-吡喃
    参考文献:
    名称:
    阳离子钯(II)络合物催化二烯与醛的杂Diels-Alder反应
    摘要:
    发现阳离子钯(II)络合物[PdL 2(RCN)2 ](BF 4)2催化未活化的简单二烯与醛的杂Diels-Alder反应,得​​到相应的5,6-dihydro-2 H -吡喃在温和条件下收率良好。
    DOI:
    10.1016/0040-4039(96)01369-x
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文献信息

  • Catalytic Asymmetric [4+2]-Cycloaddition of Dienes with Aldehydes
    作者:Luping Liu、Hyejin Kim、Youwei Xie、Christophe Farès、Philip S. J. Kaib、Richard Goddard、Benjamin List
    DOI:10.1021/jacs.7b08357
    日期:2017.10.4
    Despite its significant potential, a general catalytic asymmetric [4+2]-cycloaddition of simple and electronically unbiased dienes with any type of aldehyde has long been unknown. Previously developed methodologies invariably require activated, electronically engineered substrates. We now provide a general solution to this problem. We show that highly acidic and confined imidodiphosphorimidates (IDPis)
    尽管具有巨大的潜力,但简单且电子无偏的二烯与任何类型的醛的一般催化不对称 [4+2]-环加成一直是未知的。以前开发的方法总是需要激活的电子工程基板。我们现在为这个问题提供一个通用的解决方案。我们表明,高酸性和受限的亚胺二磷亚胺酯 (IDPis) 是多种醛和二烯的杂狄尔斯-阿尔德反应的极其有效的布朗斯台德酸催化剂,可产生对映异构体富集的二氢吡喃。通常可以观察到出色的立体选择性,并且可以轻松获取各种香味和天然产品。
  • Process for production of 5-arylpentanols
    申请人:KAO CORPORATION
    公开号:US20030060667A1
    公开(公告)日:2003-03-27
    A process for producing a 5-arylpentanol of formula (2): 1 wherein R 1 represents an aryl group which may be substituted with one or two or more of an alkyl or alkoxy group and has 6 to 12 carbon atoms in total, R 3 represents a hydrogen atom, or an alkyl or alkenyl group of 1 to 6 carbon atoms, and R 4 represents R 2 defined below when R 2 is a monovalent group or represents R 2 H when R 2 is a divalent group, which comprises effecting hydrogenolysis of a pyran compound of formula (1): 2 wherein, R 1 and R 3 are as defined above, R 2 represents a hydrogen atom, an alkyl or alkenyl group of 1 to 6 carbon atoms, or an alkylidene or alkenylidene group of 1 to 6 carbon atoms, and a dotted line represents a possible bond and any one of the three bonds represented by dotted lines and solid lines is a double bond, in the presence of one or more catalysts selected from (a) a catalyst carrying two or more elements selected from noble metals in Group VIII in the periodic table and (b) an acid type palladium-supporting catalyst. 5-arylpentanols can be prepared in a high yield with low production of hydrocarbons without causing a problem with regard to corrosion of process equipment.
    生产5-芳基戊醇的过程,其中R1代表一个芳基,可能被一个或两个或更多的烷基或烷氧基取代,在总共6到12个碳原子中,R3代表氢原子,或者1到6个碳原子的烷基或烯基,R4代表下面定义的R2,当R2是一价基团时,或者当R2是二价基团时代表R2H,包括在存在以下催化剂的作用下,对公式(1)的吡喃化合物进行氢解:其中,R1和R3如上定义,R2代表氢原子,1到6个碳原子的烷基或烯基,或者1到6个碳原子的烷基亚烯基或烯基亚烯基,虚线代表可能的键,虚线和实线代表的三个键中的任意一个是双键,在选择的一个或更多的催化剂的存在下进行,所述催化剂选择自(a)周期表中贵金属8族元素的两个或更多元素携带的催化剂和(b)酸性钯载体催化剂。5-芳基戊醇可以在高产率的情况下制备,同时产生低碳氢化合物的生产,而不会引起与工艺设备腐蚀相关的问题。
  • Process for preparing dihydropyrane compound
    申请人:Kao Corporation
    公开号:US05907048A1
    公开(公告)日:1999-05-25
    To provide a simple process for economically preparing a dihydropyrane compound at a high productivity and a high reaction yield. To use a compound selected from the group consisting of a base and a compound (VIII) having a weaker coordination power to the Lewis acid than the aldehyde compound and having an activity to dissolve the Lewis acid, coordinated by the compound (VIII), in a solvent as a co-catalyst in reacting aldehyde with a diene compound in the presence of a Lewis acid to prepare a 5,6-dihydro-2H-pyrane compound represented by formula (III): ##STR1## in which R.sup.1 represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, aryl group which may be substituted with alkyl group, having 6 to 12 total carbon atoms; R.sup.2 and R.sup.3 represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
    提供一种简单的方法,以高产率和高反应收率经济地制备二氢吡喃化合物。在存在路易斯酸的情况下,使用从羧酸和化合物(VIII)中选择的一种化合物作为协同催化剂,其中化合物(VIII)具有较弱的路易斯酸配位能力,具有溶解路易斯酸的活性,并在溶剂中与路易斯酸配位,与醛和二烯化合物反应,制备由式(III)表示的5,6-二氢-2H-吡喃化合物:##STR1## 其中R.sup.1表示氢原子,具有1至12个碳原子的烷基,具有6至12个总碳原子的可以被烷基取代的芳基基团; R.sup.2和R.sup.3表示氢原子或具有1至6个碳原子的烷基基团。
  • Novel Fragrance Compounds
    申请人:Fortineau Anne Dominique
    公开号:US20100069287A1
    公开(公告)日:2010-03-18
    A compound having the structure (A) where R1 is C1 to C5 alkyl, and R2 to R5 are independently selected from H and methyl, having a strong odour and for use as a perfumery ingredient, particularly in Muguet accords/fragrances, is provided.
    提供一种具有结构(A)的化合物,其中R1为C1至C5烷基,R2至R5分别独立选择H和甲基,具有强烈的气味,用作香料成分,特别是在鸢尾花香调/香水中。
  • Process for the preparation of dihydropyrans
    申请人:NAARDEN INTERNATIONAL N.V.
    公开号:EP0325000A1
    公开(公告)日:1989-07-26
    The invention provides a process for the preparation of 5,6-dihydro-2H-pyran derivatives, wherein an aldehyde of formula I: wherein R₁ represents an alkyl, cycloalkyl, aralkyl, alkaryl or aryl group having at most 15 carbon atoms and a diene of formula II: wherein R₂ and R₃ represents a hydrogen atom or an alkyl group having 1-6 carbon atoms are reacted in a Diels-­Alder-type reaction under the influence of an inorganic Lewis acid catalyst, producing a compound of formula III wherein R₁-R₃ have the meaning given above. Preferably R₁ represents a 1-6 carbon atom alkyl group, a phenyl group or an o-, m- p-tolyl group. Isoprene or 2-methyl-1,3-pentadiene is preferably used as the diene. The preferred catalyst is AlCl₃ or SnCl₄ and an organic nitro compound may be used as the co-catalyst.
    本发明提供了一种制备 5,6-二氢-2H-吡喃衍生物的工艺,其中式 I 的醛: 其中 R₁代表具有至多 15 个碳原子的烷基、环烷基、芳基、烷芳基或芳基和式 II: 其中 R₂ 和 R₃ 代表氢原子或具有 1-6 个碳原子的烷基,在无机路易斯酸催化剂的作用下进行 Diels-Alder 型反应,生成式 III 的化合物,其中 R₁-R₃ 具有上述含义。 R₁ 最好代表 1-6 个碳原子的烷基、苯基或邻、间、对甲苯基。异戊二烯或 2-甲基-1,3-戊二烯最好用作二烯。优选催化剂为 AlCl₃或 SnCl₄,有机硝基化合物可用作助催化剂。
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