Development of a General Pd(II)-Catalyzed Intermolecular Hydroalkoxylation Reaction of Vinylphenols by Using a Sacrificial Alcohol as the Hydride Source
摘要:
A general hydroalkoxylation of vinylphenols has been successfully developed wherein primary, secondary, and tertiary alcohols can be used as nucleophiles. The key conceptual breakthrough is the use of sec-phenethyl alcohol at relatively low concentrations as the sacrificial alcohol to undergo oxidation and provide the proposed Pd-H intermediate.
ARDUINI, A.;BOSI, A.;POCHINI, A.;UNGARO, R., TETRAHEDRON, 1985, 41, N 15, 3095-3103
作者:ARDUINI, A.、BOSI, A.、POCHINI, A.、UNGARO, R.
DOI:——
日期:——
Development of a General Pd(II)-Catalyzed Intermolecular Hydroalkoxylation Reaction of Vinylphenols by Using a Sacrificial Alcohol as the Hydride Source
作者:Yang Zhang、Matthew S. Sigman
DOI:10.1021/ol062222t
日期:2006.11.1
A general hydroalkoxylation of vinylphenols has been successfully developed wherein primary, secondary, and tertiary alcohols can be used as nucleophiles. The key conceptual breakthrough is the use of sec-phenethyl alcohol at relatively low concentrations as the sacrificial alcohol to undergo oxidation and provide the proposed Pd-H intermediate.
-quinone methides 2. Stereoselectivity in cycloaddition reactions of -quinone methides with vinyl ethers
vinyl ethers 3 and o-quinone methides 2, thermally generated from 2-hydroxybenzyl alcohols 1, have been studied. The structure and conformational preferences of the 4-substituted 2-ethoxy-(2,3)-dihydro-2H-benzopyrans 4–9 obtained, which show new interesting features, are discussed together with competitive kinetic data. The cycloaddition process is concerted and involves o-quinone methides in the E-configuration