午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

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 Indole-3-carboxylic acid
771-50-6

Indole-3-carboxylic acid synthesis

9synthesis methods
indole-3-carboxylic acid can be synthesized by the hydrolysis reaction of 3-trichloroacetyl indole: add 235g 3-trichloroacetyl indole into 1000ml methanol, slowly drop an appropriate amount of 50% KOH solution, heat up and reflux for 18 hours, cool to room temperature, The methanol was recovered by concentration, and the residual liquid was left; 1500 ml of water was added to the residual liquid, hydrochloric acid was added dropwise to adjust pH=3～4, and then filtered, and the solid obtained by filtration was dried to obtain 144g of indole-3-carboxylic acid crude product; The crude product was slurried with 100g of ethyl acetate for 25 minutes,filtered and dried to obtain indole-3-carboxylic acid (137g, yield 91.8%).

Indole-3-carboxylic acid Related Search: