An Alternative Scalable Process for the Synthesis of the Key Intermediate of Omarigliptin
作者:Guodong Sun、Mingjie Wei、Zhonghua Luo、Yongjun Liu、Zhijun Chen、Zhongqing Wang
DOI:10.1021/acs.oprd.6b00295
日期:2016.12.16
An alternative scalable process for the synthesis of the keyintermediate of omarigliptin is described. The asymmetric synthesis relies on the initial diastereoselective alkylation and subsequent aluminum-catalyzed substrate-controlled Meerwein–Ponndorf–Verley reduction. A highly regioselective 5-exo-dig iodocyclization followed to afford 11b, which was then subjected to ring-opening cycloetherification
Production method of optically active 2-[(N-benzylprolyl)amino]benzo-phenone compound
申请人:Hamada Takayuki
公开号:US20080108830A1
公开(公告)日:2008-05-08
The present invention relates to a production method of optically active 2-[(N-benzylprolyl)amino]-5-chlorobenzophenone (3) or a salt thereof, which includes reacting optically active N-benzylproline (1) with 2-amino-5-chlorobenzophenone (2) in acetonitrile and in the presence of an amide compound and thionyl chloride. According to the method of the present invention, optically active 2-[(N-benzylprolyl)amino]-5-chlorobenzophenone (3) or a salt thereof can be conveniently produced at a high purity and in a high yield:
wherein * shows an asymmetric carbon atom and the configuration of the asymmetric carbon atom is S or R.
Production method of diphenylalanine - NI(II) complex
申请人:Ajinomoto Co., Inc.
公开号:EP1918275A1
公开(公告)日:2008-05-07
The present invention relates to a production method of a compound represented by the formula (3), which includes reacting a compound represented by the formula (2) with a diphenylmethyl halide compound represented by the formula (1) in the presence of alkali metal alkoxide. According to the method of the present invention, compound (3) can be produced at a high purity and in a high yield.
wherein each symbol is as defined in the specification, *1 and *2 each show an asymmetric carbon atom, and the configuration of the asymmetric carbon atom of *1 and *2 is (S,S) or (R,R).
Production method of diphenylalanine-Ni (II) complex
申请人:Hamada Takayuki
公开号:US20080287687A1
公开(公告)日:2008-11-20
The present invention relates to a production method of a compound represented by the formula (3), which includes reacting a compound represented by the formula (2) with a diphenylmethyl halide compound represented by the formula (1) in the presence of alkali metal alkoxide. According to the method of the present invention, compound (3) can be produced at a high purity and in a high yield.
wherein each symbol is as defined in the specification, *1 and *2 each show an asymmetric carbon atom, and the configuration of the asymmetric carbon atom of *1 and *2 is (S,S) or (R,R).