An enantioselective route to cis- and trans-2-(hydroxymethyl)-5-alkylpyrrolidines
摘要:
A general method for the enantioselective preparation of 2,5-disubstituted pyrrolidines has been developed. A variety of cis- and trans-2-(hydroxymethyl)-5-alkylpyrrolidin were synthesized using 1-(benzyloxy)-5-(p-toluenesulfonamido)-3-alken-2-ol as common intermediates.
An enantioselective route to cis- and trans-2-(hydroxymethyl)-5-alkylpyrrolidines
作者:Helena Pettersson-Fasth、Steven W. Riesinger、Jan E. Baeckvall
DOI:10.1021/jo00124a021
日期:1995.9
A general method for the enantioselective preparation of 2,5-disubstituted pyrrolidines has been developed. A variety of cis- and trans-2-(hydroxymethyl)-5-alkylpyrrolidin were synthesized using 1-(benzyloxy)-5-(p-toluenesulfonamido)-3-alken-2-ol as common intermediates.
Stereoselective Route towards 2,5-Disubstituted Piperidine Alkaloids. Synthesis of (+)-Pseudoconhydrine and (±)-epi-Pseudoconhydrine
This paper describes a new general approach towards functionalized piperidinealkaloids, based on the stereo- and regioselective palladium(0)-catalyzed nucleophilic ring-opening of vinyl epoxides by nitrogen nucleophiles. The latter reaction provides access to stereodefined anti and syn aminoalcohol derivatives, 1-benzyloxy-5-(p-toluenesulfonamido)-3-alken-2-ols (5), which were transformed to (+)-pseudoconhydrine