CHIRAL PRIMARY AMINO SILYL ETHER ORGANOCATALYST FOR THE ENANTIOSELECTIVE DIELS-ALDER REACTION OF 1,2-DIHYDROPYRIDINES WITH AlDEHYDES
摘要:
The enantioselective Diels-Alder reactions of 1,2-dihydropyridines with acroleins using a chiral primary amino silyl ether organocatalyst afforded chiral isoquinuclidines with good chemical yields and excellent enantioselectivities (up to 70% and up to 99% ee).
component system comprising of a primary β-amino silyl ethers as an organocatalyst and N-protected amino acids as a co-catalyst put together worked as an efficient organocatalyst system in the heteroDiels–Alderreaction of isatins with enones affording the chiral spirooxindole-tetrahydropyranones in good chemical yields and stereoselectivities (up to 94%, up to dr 78:22., up to 85% ee).
CHIRAL PRIMARY AMINO SILYL ETHER ORGANOCATALYST FOR THE ENANTIOSELECTIVE DIELS-ALDER REACTION OF 1,2-DIHYDROPYRIDINES WITH AlDEHYDES
作者:Hiroto Nakano、Yuki Sakuta、Yoshihito Kohari、N. D. M. Romauli Hutabarat、Koji Uwai、Eunsang Kwon、Yuko Okuyama、Chigusa Seki、Haruo Matsuyama、Nobuhiro Takano、Michio Tokiwa、Mitsuhiro Takeshita
DOI:10.3987/com-12-s(n)93
日期:——
The enantioselective Diels-Alder reactions of 1,2-dihydropyridines with acroleins using a chiral primary amino silyl ether organocatalyst afforded chiral isoquinuclidines with good chemical yields and excellent enantioselectivities (up to 70% and up to 99% ee).
Simple primary β-amino alcohol catalyzed enantioselective Diels-Alder reaction of 3-hydroxy-2-pyridones
The simple primary β-amino alcohol catalyzedDiels-Alderreaction of 3-hydroxy-2-pyridones as dienes with N-substituted maleimides to provide the highly substituted optically active isoquinuclidines as a single diastereomers in excellent enantioselectivities (up to 98%) with excellent chemical yields (up to 95%) was demonstrated. A range of simple β-amino alcohols were synthesized from the corresponding