Synthesis of polycyclic structures by Diels-Alder reaction using inner-outer-ring 1,3-bis[trimethylsilyloxy]dienes
作者:José Pérez Sestelo、Madel Mar Real、Antonio Mouriño、Luis A. Sarandeses
DOI:10.1016/s0040-4039(98)02463-0
日期:1999.1
In this paper we describe regioselective one-pot preparations of inner-outer-ring 1,3-bis[trimethylsilyloxy]dienes and their Diels-Alder reactions with electron-deficient dienophiles. The dienes were prepared in quantitative yield, and the Diels-Alder reactions proceeded smoothly, regioselectively and with good yields, allowing efficient construction of highly functionalized polycyclic skeletons such
Highly Enantioselective Hetero-Diels-Alder Reaction of 1,3-Bis(silyloxy)-1,3-dienes with Aldehydes Catalyzed by Chiral Disulfonimide
作者:Joyram Guin、Constantinos Rabalakos、Benjamin List
DOI:10.1002/anie.201204262
日期:2012.8.27
with F: The title reaction proceeds using 1 mol % of the new perfluoroisopropyl chiral disulfonimide catalyst 1 to deliver several 2,6‐disubstituted and 2,5,6‐trisubstituted dihydropyrones in good yields and with excellent enantiomeric ratios. The utility of this methodology is illustrated with the first enantioselective synthesis of a potent aromatase inhibitor.
A new approach to hydrindenones by tautomer-arrested annulations of Fischer carbene complexes
作者:Mary Ellen Bos、William D. Wulff、Kenneth J. Wilson
DOI:10.1039/cc9960001863
日期:——
The reactions of 2,6-disubstituted aryl carbene complexes with alkynes give hydrindenone products if a phenol function is present which prevents aromatization to an indene product by a tautomerization of a metal complexed vinyl alcohol intermediate.