Preparation of Homoallylic Alcohols by Nickel-Catalyzed Cyclizations of Allenyl Aldehydes
摘要:
[GRAPHICS]The direct cyclization of allenyl aldehydes with organozincs in the presence of Ni(COD)(2) provides synthetically versatile homoallylic alcohols. Both monosubstituted and 1,3-disubstituted allenes participate in the process, with the latter allowing preparation of stereochemically defined trisubstituted alkenes.