Fe(II)/Fe(III)-Catalyzed Intramolecular Didehydro-Diels–Alder Reaction of Styrene-ynes
作者:Hyeon Jin Mun、Eun Young Seong、Kwang-Hyun Ahn、Eun Joo Kang
DOI:10.1021/acs.joc.7b02672
日期:2018.2.2
didehydro-Diels–Alder reaction of styrene-ynes was catalyzed by Fe(II) and Fe(III) to produce various naphthalene derivatives under microwave heating conditions. Mechanistic calculations found that the Fe(II) catalyst activates the styrenyl diene in an inverse-electron-demand Diels–Alder reaction, and the consecutive dehydrogenation reaction can be promoted by either Fe(II)-catalyzed direct dehydrogenation
The dehydrogenative cycloaddition of dieneynes, which possess a diene in the form of a styrene moiety and a dienophile in the form of an alkyne moiety, produces naphthalene derivatives when heated. It was found that a key requirement of this process is the presence of a silyl group attached to the alkyne moiety, which forces a dehydrogenation reaction to occur.