Stereoselective total synthesis of enantiomerically pure 1-trifluoromethyl tetrahydroisoquinoline alkaloids

被引:0
作者
Bravo, P [1 ]
Crucianelli, M [1 ]
Farina, A [1 ]
Meille, SV [1 ]
Volonterio, A [1 ]
Zanda, M [1 ]
机构
[1] Politecn Milan, CNR, Ctr Studio Sostanze Organ Nat, Dipartimento Chim, I-20131 Milan, Italy
关键词
beta-iminosulfoxides; quaternary stereocentre; Pictet-Spengler reaction; alkaloids; fluorine;
D O I
10.1002/(SICI)1099-0690(199803)1998:3<435::AID-EJOC435>3.0.CO;2-2
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Enantiomerically pure 1-trifluoromethyl-tetrahydroisoquinoline alkaloid analogues, in which C-1 is a quaternary stereogenic centre, have been synthesized by stereoselective intramolecular Pictet-Spengler reaction of the N-arylethyl gamma-trifluoro-beta-iminosulfoxide (R)-3, and subsequent elaborations of the sulfinyl auxiliary. The absolute stereochemistry of the stereogenic centre was determined by X-ray diffraction on the alpha-phenylpropionic ester (1R,2'S)-10.
引用
收藏
页码:435 / 440
页数:6
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