Novel pyrrolidine compound and a process for preparing the same
申请人:Moritani Yasunori
公开号:US20070167440A1
公开(公告)日:2007-07-19
The present invention relates to a novel pyrrolidine compound, which has a potent antagonistic activity against central cannabinoid (CB1) receptor, having the formula [I]: wherein each of R
1
and R
2
is (A) optionally substituted aryl (or heteroaryl) group, or (B) both of the groups combine to form a group of the formula: one of R
3
and R
4
is hydrogen and another is hydrogen, hydroxyl, hydroxyalkyl, etc., or both of R
3
and R
4
combine to form oxo group, R
5
is hydrogen or alkyl, Y is single bond, oxygen atom or a group of the formula: —N(R
7
)—, R
6
is optionally substituted hydrocarbon group or optionally substituted cyclic group, R
7
is alkyl or alkyloxycarbonylalkyl, provided that R
6
is not 4-amino-5-chloro-2-methoxyphenyl group when Y is single bond and one of the R
3
and R
4
is hydrogen and another is hydroxymethyl, or a pharmaceutically acceptable salt thereof.
bioorganic chemistry. Herein, we reported a visible‐light‐induced iron‐catalyzed α‐alkylation of oxindoles with alcohols to offer a variety of α‐alkylled oxindoles at roomtemperature. This reaction featured broad substrate scope with good functional tolerance under simple conditions. Detailed mechanistic studies has been done to illuminate the essetial role of light in this borrowing hydrogen (BH) reaction
Nishio, Takehiko, Journal of the Chemical Society. Perkin transactions I, 1991, # 7, p. 1717 - 1720
作者:Nishio, Takehiko
DOI:——
日期:——
US8034949B2
申请人:——
公开号:US8034949B2
公开(公告)日:2011-10-11
Ionic Nucleophilic Catalysis of Chiral Ammonium Betaines for Highly Stereoselective Aldol Reaction from Oxindole-Derived Vinylic Carbonates
作者:Daisuke Uraguchi、Kyohei Koshimoto、Takashi Ooi
DOI:10.1021/ja3022939
日期:2012.4.25
A new strategy for developing stereoselective bond-forming reactions is introduced; it takes advantage of the ionicnucleophilic catalysis of chiralammoniumbetaines to utilize vinylic esters simultaneously as the enolate precursor and the acylating agent for coupling with electrophiles. Its synthetic utility is clearly demonstrated by the realization of a highly diastereo- and enantioselective aldol