Asymmetric synthesis of all 8 stereoisomers of α-methyl homoallylic alcohols derived by crotyl addition onto bis(hydroxymethyl)acetaldehydes (BHYMA*)
摘要:
The asymmetric synthesis of epimeric alpha-methyl homoallylic alcohols 4 and 7 has been realized respectively through chelation-controlled addition of crotyltributyltin to asymmetrized bis(hydroxymethyl)acetaldehydes (BHYMA*) 3, and via chelation-controlled reduction of ketones 8. Due to the stereochemical flexibility of the C-5 chiral centre and to the enantiodivergent preparation of both enantiomers of 3, all 8 isomers of these crotylation products become accessible, starting from an unique precursor 1.
Asymmetric synthesis of all 8 stereoisomers of α-methyl homoallylic alcohols derived by crotyl addition onto bis(hydroxymethyl)acetaldehydes (BHYMA*)
摘要:
The asymmetric synthesis of epimeric alpha-methyl homoallylic alcohols 4 and 7 has been realized respectively through chelation-controlled addition of crotyltributyltin to asymmetrized bis(hydroxymethyl)acetaldehydes (BHYMA*) 3, and via chelation-controlled reduction of ketones 8. Due to the stereochemical flexibility of the C-5 chiral centre and to the enantiodivergent preparation of both enantiomers of 3, all 8 isomers of these crotylation products become accessible, starting from an unique precursor 1.
Asymmetric synthesis of all 8 stereoisomers of α-methyl homoallylic alcohols derived by crotyl addition onto bis(hydroxymethyl)acetaldehydes (BHYMA*)
作者:Giuseppe Guanti、Luca Banfi、M.Teresa Zannetti
DOI:10.1016/s0040-4039(00)73941-4
日期:1993.1
The asymmetric synthesis of epimeric alpha-methyl homoallylic alcohols 4 and 7 has been realized respectively through chelation-controlled addition of crotyltributyltin to asymmetrized bis(hydroxymethyl)acetaldehydes (BHYMA*) 3, and via chelation-controlled reduction of ketones 8. Due to the stereochemical flexibility of the C-5 chiral centre and to the enantiodivergent preparation of both enantiomers of 3, all 8 isomers of these crotylation products become accessible, starting from an unique precursor 1.