The enantioselective total synthesis of the telomerase inhibitor UCS1025A has been accomplished. The key transformation involves a remarkable boron Reformatsky coupling of iodolactone 13 and aldehyde 17.
N-Azabicyclo/3.3.0/octane amides of aromatic acids
申请人:G.D. Searle & Co.
公开号:EP0417746A2
公开(公告)日:1991-03-20
A compound of the formula
or a pharmaceutically acceptable salt thereof wherein
n is 0 or 1; and
Ar is an aromatic amide moiety, which compound exhibits prokinetic activity and is a 5-HT3 antagonist.
式中的化合物
或其药学上可接受的盐 其中
n 是 0 或 1;以及
Ar 是芳香族酰胺分子,该化合物具有促激活性,是 5-HT3 拮抗剂。
SC-53116: the first selective agonist at the newly identified serotonin 5-HT4 receptor subtype
作者:Daniel L. Flynn、Daniel L. Zabrowski、Daniel P. Becker、Roger Nosal、Clara I. Villamil、Gary W. Gullikson、Chafiq Moummi、Dai C. Yang
DOI:10.1021/jm00086a019
日期:1992.4
US4992461A
申请人:——
公开号:US4992461A
公开(公告)日:1991-02-12
US5126343A
申请人:——
公开号:US5126343A
公开(公告)日:1992-06-30
Phosphine‐Catalyzed (4+1) Annulation: Rearrangement of Allenylic Carbamates to 3‐Pyrrolines through Phosphonium Diene Intermediates
作者:Brian R. Blank、Ian P. Andrews、Ohyun Kwon
DOI:10.1002/cctc.202000626
日期:2020.9.4
and mononucleophiles unexpectedly unveiled that a phosphine‐catalyzed (4+1) reaction for the construction of cyclopentene products, previously reported by Tong, might not occur through a phosphonium diene, as had been proposed, but rather through multiple mechanisms working in concert. Consequently, our phosphine‐catalyzed rearrangement is most likely the first transformation to involve the unequivocal