成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List 4-[[(1,1-Dimethylethoxy)carbonyl]amino]-2-cyclopentene-1-carboxylic acid methyl ester
168683-02-1

4-[[(1,1-Dimethylethoxy)carbonyl]amino]-2-cyclopentene-1-carboxylic acid methyl ester synthesis

8synthesis methods
-

Yield:168683-02-1 99%

Reaction Conditions:

with sodium carbonate in n-heptane;water;

Steps:

4 Example 4

Example 4 17.7 g (0.100 mol) of cis-4-amino-2-cyclopentene-1-carboxylic acid methyl ester hydrochloride, 22.9 g (0.105 mol) of di-tert-butyl dicarbonate, 5.6 g (0.053 mol) of sodium carbonate and 70 mL of heptane were put into a four-necked flask (300 mL volume) and equipped with a thermometer. While this mixture was stirred, 100 mL of water was added, and then the mixture was stirred for 3 hours at room temperature. The organic layer separated after the stirring was stopped. The solvent was distilled off from the organic layer under reduced pressure to give 23.9 g (0.099 mol) of cis-4-tert-butoxycarbonylamino-2-cyclopentene-1-carboxylic acid methyl ester. The yield was 99%.

References:

EP1334969,2003,A1

4-[[(1,1-Dimethylethoxy)carbonyl]amino]-2-cyclopentene-1-carboxylic acid methyl ester Related Search: