Planar Chiral Phosphino[2.2]paracyclophanol-Catalyzed Highly Regio- and Stereoselective [3+2] Annulation Reaction of Morita–Baylis–Hillman Carbonates with Dicyanomethylideneoxindoles
作者:Shinji Kitagaki、Mayuka Tsuji、Hideki Teramoto、Naoko Takenaga、Keisuke Yoshida
DOI:10.3987/com-19-s(f)3
日期:——
yields, and high regio-, diastereo-, and enantioselectivities. INTRODUCTION [2.2]Paracyclophane (PCP) is recognized as a useful planar chiral backbone for ligands used in transition metal catalysts.1 A variety of asymmetric reactions based on catalysts with planar chiral PCP-based ligands, combined with appropriate central chirality, have been reported to date.2 However, there is little information available
[Problems] A compound, which is useful as an active ingredient for a pharmaceutical composition, for example a pharmaceutical composition for treating constipation-type irritable bowel syndrome, atonic constipation and/or functional gastrointestinal disorder, is provided.
[Means for Solution] The present inventors have extensively studied compounds having TRPA1 channel activation activity, and confirmed that an indolinone compound has a TRPA1 channel activation activity, and thus completed the present invention. The indolinone compound of the present invention has a TRPA1 channel activation activity and can be used as an active ingredient of a pharmaceutical composition for preventing and/or treating constipation-type irritable bowel syndrome, atonic constipation and/or functional gastrointestinal disorder or the like.
Herein, we present a new development of the previously described aza-Michael-initiated ring closure (MIRC) process to access spirooxindole cores. The key spiro-cyclization step between various α-bromoacetamides and methyleneindolinones was efficient and tolerant of a wide range of functional groups. Yields and diastereoselectivities for the spirocyclization were usually high and furnished original