Synthesis of a model bicyclic core related to Microscleroderma spirophora steroids
摘要:
An approach to the strained B,C-bicyclic nucleus of a heterocyclic class of steroids is described. The approach relies on a sigmatropic shift for installation of the strained bridge. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of a model bicyclic core related to Microscleroderma spirophora steroids
摘要:
An approach to the strained B,C-bicyclic nucleus of a heterocyclic class of steroids is described. The approach relies on a sigmatropic shift for installation of the strained bridge. (C) 2003 Elsevier Science Ltd. All rights reserved.
Three step syntheses of naphthofurans and phenanthrofurans related to (−)-morphine from ortho-benzoquinone monoketals by Diels–Alder and Cope reactions
作者:Rina Carlini
DOI:10.1039/a705848i
日期:——
Adducts of the intramolecular DielsâAlder reaction of o-benzoquinone monoketals are rapidly converted to oxygen heterocycles via Cope rearrangements.
邻苯醌单金属分子内 DielsâAlder 反应的加合物通过 Cope 重排迅速转化为氧杂环。
CURABLE COMPOSITION AND CURED ARTICLE
申请人:Adeka Corporation
公开号:EP2749581A1
公开(公告)日:2014-07-02
Provided are: a curable composition from which a cured article having excellent molding processability and high heat resistance as well as such a high Tg that it can be used as a molding resin for a SiC power semiconductor can be obtained; and a cured article thereof. The curable composition comprises: 100 parts by mass of a compound having at least two partial structures represented by the following Formula (1) in the molecule as a component (A); 0.5 to 3 parts by mass of a thermal radical generator as a component (B); and 0 to 50 parts by mass of other radical-reactive compound as a component (C):
(wherein, ring A represents a benzene ring or a cyclohexyl ring; R1 represents an alkylene group having 1 to 6 carbon atoms; R2 represents an alkyl group having 1 to 4 carbon atoms; a represents a number of 0 or 1; b represents an integer of 0 to 3; and c represents a number of 1 or 2).
Synthesis of a model bicyclic core related to Microscleroderma spirophora steroids
作者:Anand Mayasundari、Ulf Peters、David G.J. Young
DOI:10.1016/s0040-4039(03)00378-2
日期:2003.3
An approach to the strained B,C-bicyclic nucleus of a heterocyclic class of steroids is described. The approach relies on a sigmatropic shift for installation of the strained bridge. (C) 2003 Elsevier Science Ltd. All rights reserved.