HRID3089

反应详情

EQUATION

反应方程式

REACTANTS

反应物

HCID65578

Ethanedioyl dichloride

C2Cl2O2

结构：CC(=O)O[C@H]1CC[C@@]2(C)C(=CC[C@H]3[C@@H]4CC[C@H]([C@H](C)CCC(=O)O)[C@@]4(C)CC[C@@H]32)C1

HCID11101791

未命名化合物

PRODUCTS

生成物

结构：CC(=O)O[C@H]1CC[C@@]2(C)C(=CC[C@H]3[C@@H]4CC[C@H]([C@H](C)CCC(=O)Cl)[C@@]4(C)CC[C@@H]32)C1

HCID12953337

未命名化合物

AUXILIARIES

试剂、催化剂与溶剂

溶剂HCID6344

Dichloromethane

CH2Cl2

PROCEDURE

实验过程

To a solution of 3β-acetoxy-5-cholenic acid (50.0 g, 118 mmole) in dry dichloromethane (200 ml) was added dropwise oxalyl chloride (30 ml, 448 mmole). The solution was stirred at room temperature for one hour and then concentrated in vacuo to obtain 3β-acetoxy-5-cholenic acid chloride 331. 1H NMR (400 MHz, CDCl3) δ: 0.70 (3H, s, 18-CH3), 0.95 (3H, d, 21-CH3), 1.05 (3H, s, 19-CH3), 2.04 (3H, s, --OCOCH3), 4.60 (1H, m, 3α-H), 5.38 (1H, m, 6-H). Compound 331 was used in the following step without purification.

WORKUP

后处理

concentrationconcentrated in vacuo