Catalytic aminomercuration reactions of 3-alken-1-ynes: an improved method for the synthesis of 2-amino-1,3-butadienes and 1-aza-1,3-butadienes
摘要:
Catalytic aminomercuration of 3-alken-1-ynes leads to 1-aza-1,3-butadienes and 2-amino-1,3-butadienes. Under appropriate reaction conditions it is possible to prepare these compounds via mercuration of 3-alken-1-ynes in the presence of either aromatic or aliphatic primary and secondary amines. Depending on the substituents in the starting 3-alken-1-yne, the mercuration reaction may afford gamma-amino enamines instead of 2-amino-1,3-butadienes and 3-imino amines or 4-amino-1-aza-1,3-butadienes instead of 1-aza-1,3-butadienes.
2-Morpholinobutadienes have been found to show different behaviour in the reaction with isocyanates and isothiocyanates. While isocyanates give rise always to openchain compounds, isothiocyanates yield mainly thiin1 derivatives.
Reactions of 2‐Amino‐1,3‐butadienes and Fischer Alkynyl Carbenes: Up to Nine C−C Bonds and Seven Stereogenic Centers Created in a Stereoselective Manner through a Cascade Process
Stereoselective Synthesis of Seven-Membered Carbocycles from 2-Amino-1,3-butadienes and Vinyl Chromium Fischer-Type Carbenes
作者:Jose Barluenga、Fernando Aznar、Alfredo Martin、Jesus T. Vazquez
DOI:10.1021/ja00142a006
日期:1995.9
Seven-membered ring carbocycles are prepared by reaction of easily avaliable 2-amino-1,3-butadienes with vinyl Fischer carbenes. Hydrolysis of the cycloadduct initially formed gives rise to cyclohepta-1,3-diones with total regio- and stereoselectivity in a one-pot process. When 2-aminobutadienes bearing a prolinol derivative as a chiral auxiliary are used, the corresponding cyclic diketones are obtained with very high enantiomeric excesses. The absolute configuration of the stereogenic centers generated was determined with the aid of ROESY and CD measurements.
BARLUENGA, JOSE;AZNAR, FERNANDO;CABAL, MARIA-PAZ;VALDES, CARLOS, J. CHEM. SOC. PERKIN TRANS. PT 1,(1990) N, C. 633-638
作者:BARLUENGA, JOSE、AZNAR, FERNANDO、CABAL, MARIA-PAZ、VALDES, CARLOS