反应 #5637

反应方程式

ethyl chloroformate

product

(+/-)-2'-(2-Aminoethyl)-3',4'-dihydrospiro[cyclopentane-1,1'(2'H)-napthalen]-2'-ol

triethylamine

→

title compound

收率 98.0%

Ethyl (+/-)-[2-(3',4'-dihydro-2'-hydroxyspiro[cyclopentane-1,1'(2'H)-napthalen]-2'-yl)ethyl]carbamate

收率 98.0%

溶剂

CH2Cl2

CH2Cl2

反应条件

后处理

1. 1
   洗涤washed with water
2. 2
   萃取The aqueous phase was extracted with CH2Cl2 (3×20 mL)
3. 3
   干燥the combined organic extracts were dried (MgSO4)
4. 4
   过滤filtered
5. 5
   浓缩concentrated
6. 6
   其他The residue was purified by chromatography (silica gel, 1:1 heptane/ethyl acetate)

实验过程

A solution of the product from Example 9 (1.05 g, 4.28 mmol) and triethylamine (0.44 g, 4.35 mmol) in 10 mL of CH2Cl2 was cooled to 0° C. and ethyl chloroformate (0.47 g, 4.33 mmol) in 5 mL CH2Cl2 was added dropwise. The reaction was warmed to room temperature and washed with water. The aqueous phase was extracted with CH2Cl2 (3×20 mL) and the combined organic extracts were dried (MgSO4), filtered and concentrated. The residue was purified by chromatography (silica gel, 1:1 heptane/ethyl acetate) to give the title compound (1.33 g, 98%) as an oil.

来源