天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

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 NIPRADILOL
81486-22-8

NIPRADILOL synthesis

8synthesis methods
91520-01-3 Synthesis
3,4-Dihydro-8-methoxy-2H-1-benzopyran-3-ol

91520-01-3
19 suppliers
inquiry

-

Yield:-

Steps:

Multi-step reaction with 4 steps
1: 88.9 percent / 47 percent HBr / 9 h / 90 °C
2: 1.) ethyl chloroformate, triethylamine; 2.) Ac2O, fum. HNO3; 3.) NaOH / 1.) THF, 0-5 deg C, 0.5 h; 2.) acetonitrile, -8 deg C, 1 h; 3.) MeOH, H2O, RT, 0.5 h
3: 1 N NaOH / 2 h / 50 °C
4: methanol / 1 h / 70 °C

References:

Shiratsuchi;Kawamura;Akashi;Fujii;Ishihama;Uchida [Chemical and Pharmaceutical Bulletin,1987,vol. 35,# 2,p. 632 - 641]

NIPRADILOL Related Search: