dimethyl 2-(2-bromoprop-2-enyl)-2-[(2S,3R,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-6-ethoxy-3,6-dihydro-2H-pyran-3-yl]propanedioate | 187990-48-3

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: dimethyl 2-(2-bromoprop-2-enyl)-2-[(2S,3R,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-6-ethoxy-3,6-dihydro-2H-pyran-3-yl]propanedioate
• CAS: 187990-48-3
• 化学式: C₂₂H₃₇BrO₇Si
• 分子量: 521.521
• InChiKey: SUUGGIZWXBRXIQ-KSZLIROESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.57
• 重原子数：
  31
• 可旋转键数：
  13
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  80.3
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  dimethyl 2-(2-bromoprop-2-enyl)-2-[(2S,3R,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-6-ethoxy-3,6-dihydro-2H-pyran-3-yl]propanedioate 在 palladium diacetate 、 四丁基硫酸氢铵 、 三乙胺 、 三苯基膦 作用下， 以 水 、 乙腈 为溶剂， 反应 24.0h， 以80%的产率得到dimethyl (1S,4aS,7aR)-1-[[tert-butyl(dimethyl)silyl]oxymethyl]-5-methylidene-1,4a,6,7a-tetrahydrocyclopenta[c]pyran-7,7-dicarboxylate
  参考文献：
  名称：

  Palladium-Mediated Cyclization on Carbohydrate Templates. 1. Synthesis of Enantiopure Bicyclic Compounds

  摘要：

  The bromo unsaturated carbohydrates 30 and 9 were prepared from ethyl 4,6-di-O-acetyl-2,3-dideoxy-D-erythro-hex-2-enopyranoside (1a) and (7) by deacetylation followed by monosilylation with TBDMSCl and then alkylation with BrCH2CBr=CH2. The three analogues 6 and 10 were obtained using the same methodology after inversion at C-4 via a Mitsunobu reaction. The N- and C-analogues 4b and 5 were prepared by palladium alkylation of the carbonate 2d with TsNHCH(2)CBr=CH2 and (CO(2)Me)(2)CHCH2CBr=CH2, respectively. Treatment of the unsaturated carbohydrates 3a and 9 with a catalytic amount of Pd(OAc)(2)/PPh(3) in CH3CN/H2O in the presence of Bu(4)NHSO(4) and NEt(3) afforded the bicyclic compound 14a. The N- and C-analogues 14b and 14c were obtained using the same conditions and starting, respectively, from 4b and 5. On the other hand, treatment of the three derivatives 6 and 10 under these conditions gave the furanic structure 15. In the case of compound 30, performing the reaction in the presence of sodium formate yielded the bicyclic 2-deoxy carbohydrate 17.

  DOI：

  10.1021/jo961881o
• 作为产物：
  描述：

  ethyl 6-O-tert-butyldimethylsilyl-4-hydroxyl-2,3-dideoxy-α-D-erythro-hex-2-enopyranoside 在 4-二甲氨基吡啶 、 tris(dibenzylideneacetone)dipalladium (0) 、 1,4-双(二苯基膦)丁烷 作用下， 以 四氢呋喃 、 吡啶 为溶剂， 反应 30.0h， 生成 dimethyl 2-(2-bromoprop-2-enyl)-2-[(2S,3R,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-6-ethoxy-3,6-dihydro-2H-pyran-3-yl]propanedioate
  参考文献：
  名称：

  Palladium-Mediated Cyclization on Carbohydrate Templates. 1. Synthesis of Enantiopure Bicyclic Compounds

  摘要：

  The bromo unsaturated carbohydrates 30 and 9 were prepared from ethyl 4,6-di-O-acetyl-2,3-dideoxy-D-erythro-hex-2-enopyranoside (1a) and (7) by deacetylation followed by monosilylation with TBDMSCl and then alkylation with BrCH2CBr=CH2. The three analogues 6 and 10 were obtained using the same methodology after inversion at C-4 via a Mitsunobu reaction. The N- and C-analogues 4b and 5 were prepared by palladium alkylation of the carbonate 2d with TsNHCH(2)CBr=CH2 and (CO(2)Me)(2)CHCH2CBr=CH2, respectively. Treatment of the unsaturated carbohydrates 3a and 9 with a catalytic amount of Pd(OAc)(2)/PPh(3) in CH3CN/H2O in the presence of Bu(4)NHSO(4) and NEt(3) afforded the bicyclic compound 14a. The N- and C-analogues 14b and 14c were obtained using the same conditions and starting, respectively, from 4b and 5. On the other hand, treatment of the three derivatives 6 and 10 under these conditions gave the furanic structure 15. In the case of compound 30, performing the reaction in the presence of sodium formate yielded the bicyclic 2-deoxy carbohydrate 17.

  DOI：

  10.1021/jo961881o

文献信息

• Palladium-Mediated Cyclization on Carbohydrate Templates. 1. Synthesis of Enantiopure Bicyclic Compounds
  作者：Jean-Flaubert Nguefack、Véronique Bolitt、Denis Sinou

  DOI：10.1021/jo961881o

  日期：1997.3.1

  The bromo unsaturated carbohydrates 30 and 9 were prepared from ethyl 4,6-di-O-acetyl-2,3-dideoxy-D-erythro-hex-2-enopyranoside (1a) and (7) by deacetylation followed by monosilylation with TBDMSCl and then alkylation with BrCH2CBr=CH2. The three analogues 6 and 10 were obtained using the same methodology after inversion at C-4 via a Mitsunobu reaction. The N- and C-analogues 4b and 5 were prepared by palladium alkylation of the carbonate 2d with TsNHCH(2)CBr=CH2 and (CO(2)Me)(2)CHCH2CBr=CH2, respectively. Treatment of the unsaturated carbohydrates 3a and 9 with a catalytic amount of Pd(OAc)(2)/PPh(3) in CH3CN/H2O in the presence of Bu(4)NHSO(4) and NEt(3) afforded the bicyclic compound 14a. The N- and C-analogues 14b and 14c were obtained using the same conditions and starting, respectively, from 4b and 5. On the other hand, treatment of the three derivatives 6 and 10 under these conditions gave the furanic structure 15. In the case of compound 30, performing the reaction in the presence of sodium formate yielded the bicyclic 2-deoxy carbohydrate 17.