Three convergent routes to thiophenes are described, hinging on the radical addition of alpha-xanthyl ketones to ethyl vinyl sulfide or to vinyl pivalate. The latter route ultimately proved to be the most versatile and efficient (61-94%).
Synthesis of substituted naphthalenes from α-tetralones generated by a xanthate radical addition–cyclisation sequence
作者:Alejandro Cordero-Vargas、Inés Pérez-Martín、Béatrice Quiclet-Sire、Samir Z. Zard
DOI:10.1039/b411158c
日期:——
A simple, highly efficient and cheap synthesis of substitutednaphthalenes is reported. These aromatic compounds can be easily prepared in acidic or basic conditions from [small alpha]-tetralones, obtained by a xanthate-mediated addition-cyclisation sequence.
Method of preparing benzazepines and derivatives thereof
申请人:Zard Samir
公开号:US20070185323A1
公开(公告)日:2007-08-09
The invention relates to a method of preparing benzazepine compounds having general formula (IA) consisting in reacting at least one compound having general formula (IIA) with an olefin, the compound thus obtained then being cyclised such as to produce tetralone, followed by the oxime derivative of same, which, by transformation by a Beckmann rearrangement, gives rise to the desired compounds.