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!

339029-35-5

1-[3-CHLORO-5-(TRIFLUOROMETHYL)-2-PYRIDINYL]TETRAHYDRO-4(1H)-PYRIDINONE synthesis

1synthesis methods
-

Yield:339029-35-5 89%

Reaction Conditions:

in N,N-dimethyl-formamide at 70;

Steps:

3

Scheme 3IV l-(3-Chloro-5-(trifluoromethyl) pyrid-2-yI)-4-piperidone (IV).A solution of 2,3-dichloro-5-(trifluoromethyl)pyridine (32 mmol) and 4- piperidone hydrochloride monohydrate (32 mmol) in DMF (60 ml) was stirred at 700C overnight. After cooling, it was mixed with saturated NH4Cl solution and extracted with ethyl ether. The organic phase was dried with MgSO4 and the solvent was removed by rotavapor, obtaining crude product (IV) in 89% yield.

References:

WO2007/62175,2007,A2 Location in patent:Page/Page column 26