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 METHYL 3,5-DINITRO-4-HYDROXYBENZOATE
33927-05-8

METHYL 3,5-DINITRO-4-HYDROXYBENZOATE synthesis

5synthesis methods
-

Yield:-

Reaction Conditions:

in methanol;thionyl chloride;

Steps:

15.A A.

A. Methyl 3,5-Dinitro-4-Hydroxybenzoate 3,5-dinitro-4-hydroxybenzoic acid (4.56 g 20 mmole) was taken up in thionyl chloride (40 ml) and refluxed for 4 hours. The thionyl chloride was then removed by distillation under reduced pressure to give the crude acid chloride which was used without further purification in the next step of the reaction. The crude acid chloride was redissolved in dry methanol (50 ml) and refluxed for 1 hour. The reaction mixture was stored at -20° C. overnight whereupon the solid separated. This solid was filtered, dried and recrystallized from methanol to yield the desired product, 4.00 g (83%), m.p. 110°-115° C.

References:

US5514676,1996,A

METHYL 3,5-DINITRO-4-HYDROXYBENZOATE Related Search: