Lewis Acid Catalyzed Reaction of Methylenecyclopropanes with 1,2-Diphenyldiselane or 1,2-Di-p-tolyldisulfane
摘要:
Catalyzed by Lewis acid, 1,2-diphenyldiselane or 1,2-di-p-tolyldisulfane could add to methylenecyclopropanes smoothly. Compared with the reported free radical additions, the results were quite different. A four-membered carbon ring was constructed to give cyclobutane-1,1-diylbis(phenylselane) derivatives or cyclobutane-1,1-diylbis(p-tolylsulfane) derivatives as products, which are useful intermediates in organic synthesis.
Strain-Promoted Oxidation of Methylenecyclopropane Derivatives using <i>N</i>-Hydroxyphthalimide and Molecular Oxygen in the Dark
作者:T. E. Anderson、K. A. Woerpel
DOI:10.1021/acs.orglett.0c02075
日期:2020.7.17
The hydroperoxidation of alkylidenecyclopropanes and other strained alkenes using an N-hydroxylamine and molecular oxygen occurred in the absence of catalyst, initiator, or light. The oxidation reaction proceeds through a radical pathway that is initiated by autoxidation of the alkene substrate. The hydroperoxides were converted to their corresponding alcohols and ketones under mild conditions.
Synthesis of Fluorinated Homoallylic Compounds by Fluoroalkyl Radical Mediated Ring Opening of Methylenecyclopropanes
作者:Huajun Xie、Bo Xu
DOI:10.1002/ejoc.201600380
日期:2016.5
The fluoroalkyl (Rf) radical mediated ringopening of methylenecyclopropanes (MCPs) 1 and subsequent atom transfer were investigated. In the first part, a copper-initiated radical reaction of Rf–X (X = I, Br) with MCP 1 gave homoallylic halides 2 in excellent yields. Similarly, radical reaction of the RfTMS/CsF/PhI(OCOR)2 system with MCP 1 led to homoallylic alcohol esters 3 in moderate to good yields
Bromine Radical-Mediated Sequential Radical Rearrangement and Addition Reaction of Alkylidenecyclopropanes
作者:Takashi Kippo、Kanako Hamaoka、Ilhyong Ryu
DOI:10.1021/ja311821h
日期:2013.1.16
Bromine radical-mediated cyclopropylcarbinyl-homoallyl rearrangement of alkylidenecyclopropanes was effectively accomplished by C-C bond formation with allylic bromides, which led to the syntheses of 2-bromo-1,6-dienes. A three-component coupling reaction comprising alkylidenecyclopropanes, allylic bromides, and carbon monoxide also proceeded well to give 2-bromo-1,7-dien-5-ones in good yield.
溴自由基介导的亚烷基环丙烷的环丙基羰基-高烯丙基重排通过与烯丙基溴形成 CC 键有效地完成,从而合成 2-溴-1,6-二烯。包括亚烷基环丙烷、烯丙基溴和一氧化碳的三组分偶联反应也进行得很好,以良好的收率得到2-溴-1,7-二烯-5-酮。
Cyclopropylidd̀enecyclanes oxydation par l'acide peroxycarboximidique
作者:Marcel Bertrand、Alain Meou、Arlette Tubul
DOI:10.1016/s0040-4039(00)88659-1
日期:1982.1
TUSUL A.; BERTRAND M.; CHIGLIONE C., TETRAHEDRON LETT., 1979, NO 26, 2381-2384