Synthesis of Tetrahydropyran-4-ones and Thiopyran-4-ones from Donor-Substituted α-Bromostyrene Derivatives
作者:Anna Rosiak、Wolfgang Frey、Jens Christoffers
DOI:10.1002/ejoc.200600372
日期:2006.9
Tetrahydropyran-4-one and tetrahydrothiopyran-4-one derivatives with a 3-aryl substituent were synthesized by double-conjugate addition of water or H2S to divinyl ketones. These starting materials were prepared in two steps by conversion of lithiated α-bromostyrene derivatives with acrolein or cinnamaldehyde and subsequent oxidation of the divinyl alcohols with MnO2. The electron-rich α-bromostyrene
Compounds of a certain formula 1, in which R1, R2 and R3 have the meanings indicated in the description, are novel effective PDE4 inhibitors.
Synthesis of 3-Aryl-Substituted Tetrahydropyran-4-ones and Tetrahydrothiopyran-4-ones
作者:Jens Christoffers、Anna Rosiak
DOI:10.1055/s-2006-941572
日期:2006.6
A series of tetrahydropyran-4-one and tetrahydrothiopyran-4-one derivatives with 3-aryl or 3,6-diaryl substituents were prepared by double conjugate addition of water or H2S to divinyl ketones. These starting materials were accessed in two steps by conversion of lithiated α-bromostyrene derivatives with acrolein or cinnamaldehyde and subsequent oxidation of the divinylalcohols with MnO2.