94319-63-8Relevant articles and documents
A bifunctional lewis acid induced cascade cyclization to the tricyclic core of ent-kaurenoids and its application to the formal synthesis of (±)-platensimycin
Zhu, Lizhi,Han, Yejian,Du, Guangyan,Lee, Chi-Sing
supporting information, p. 524 - 527 (2013/04/23)
A mild and efficient bifunctional Lewis acid induced cascade cyclization reaction has been developed for construction of the tricyclic core of ent-kaurenoids. With ZnBr2 as the bifunctional Lewis acid, a series of substituted enones and dienes underwent cascade cyclization smoothly at room temperature and provided the tricyclic products in one pot with good yields (75-91%) and high diastereoselectivity. The cyclized product has been successfully employed for the formal synthesis of (±)-platensimycin.
2,3a,5,6,7,7a-HEXAHYDRO-3H,4H-BENZOTHIOPHENE-3,4-DIONE AND CYCLOPENTA-TETRAHYDROTHIOPHENE-3,4-DIONE ENOLATE ANIONS AS SYNTHETIC EQUIVALENTS TO CYCLOHEX-2-ENONE AND CYCLOPENT-2-ENONE C-2-CARBANIONS.
Baraldi, Pier Giovanni,Barco, Achille,Benetti, Simonetta,Pollini, Gian Piero,Zanirato, Vinicio
, p. 4291 - 4294 (2007/10/02)
An efficient procedure for α-alkylation of cyclohex-2-enone and cyclopent-2-enone involving a base-promoted tandem of retrograde Dieckmann-Michael reactions of the C-alkylated derivatives of the title heterocycles is presented.