Radical cyclization of α-allenic ketone: A new approach to the synthesis of (±)-α-chamigrene
作者:Yao-Jung Chen、Chi-Ying Wang、Wen-Yuan Lin
DOI:10.1016/0040-4020(96)00785-5
日期:1996.10
A regioselective cyclization of ε-alkyl radicals attacking on the sp-carbon of α-allenic ketone to construct a spiro[5.5]undecane skeleton has been studied, and a new approach to the synthesis of (±)-α-chamigrene 22 is also reported.
SOLID FORMS OF 2-(TERT-BUTYLAMINO)-4-((1R,3R,4R)-3-HYDROXY-4-METHYLCYCLOHEXYLAMINO)-PYRIMIDINE-5-CARBOXAMIDE, COMPOSITIONS THEREOF AND METHODS OF THEIR USE
申请人:Signal Pharmaceuticals, LLC
公开号:US20150210650A1
公开(公告)日:2015-07-30
Provided herein are formulations, processes, solid forms and methods of use relating to 2-(tert-butylamino)-4-((1R,3R,4R)-3-hydroxy-4-methylcyclohexylamino)-pyrimidine-5-carboxamide.
Conjugate addition of alkyl groups to α,β-unsaturated sulfoxides via Michael addition of nitroparaffins and subsequent denitration with tributyltin hydride
Michael addition of nitroparaffins to α,β-unsaturated sulfoxides is well effected in the presence of DBU. The nitro group in the adduct is replaced by hydrogen with Bu3SnH without influence to the sulfinyl function. The overall reations provide an efficient method for the conjugateaddition of alkyl groups to α,β-unsaturated sulfoxides.
A process for the preparation of nitroolefins which comprises heating a solution of a nitroalcohol of the formula: ##STR1## to at least 125.degree. C. to give a corresponding nitroolefin which is contacted in situ with nucleophilic addition reagent.
Total synthesis of (±)-acoradiene via radical cyclization
作者:Yao-Jung Chen、Wen-Yuan Lin
DOI:10.1016/s0040-4020(01)80555-x
日期:1993.1
Acoradiene 7a, isolated from vetiver oil, is one kind of spirocyclic sesquiterpenes containing the spiro[4.5]decane nucleus. A new synthetic approach towards the total synthesis of (±)-acoradiene via free radical cyclization for the construction of the spiro[4.5]decane nucleus has been completed.