A broad variety of unactivated acyclic and alicyclic substrates cleanly undergo site‐selective alkenylation of unactivated C(sp3)−H bonds with 1,2‐bis(phenylsulfonyl)ethene in the presence of persulfate. This simple transformation furnishes (E)‐2‐alkylvinylphenylsulfones in up to 88 % yield. In contrast with the previously reported decatungstate protocol, the current method is applicable to alkenylation
Acid Catalyzed Rearrangements of Conjugated Cyclopropyl and Epoxy Ketones
作者:E. Lee-Ruff、P. Khazanie
DOI:10.1139/v75-242
日期:1975.6.15
A series of spiro[n.2]alkan-2-ones and their 6 and 7 oxa derivatives were subjected to acid catalysis. In the former series, products arising from hydroxyl(cyclopropyl)carbinyl cations are observed...
Self-terminating, oxidative radical cyclizations of medium-sized cycloalkynones with inorganic and organic oxygen-centered radicals of type XO˙: the reaction pathway depends on the nature of X
作者:Uta Wille、Christian Jargstorff
DOI:10.1039/b201672a
日期:2002.4.9
The reaction of various inorganic and organic oxygen-centered radicals of type XO˙ with cyclodec-5-ynone 6 can be used as a mechanistic probe to study the ease with which X˙ acts as a leaving group in self-terminating, oxidative radical cyclizations. It was observed that when X˙ has good leaving ability the reaction leads to formation of the bicyclic epoxy ketones 13 and 14, whereas in the other cases
Lewis acid catalyzed rearrangements of structurally related α,β-unsaturated epoxy ketones and oximes. A complementary approach to the synthesis of isomeric 1,4-diketospiro[n,m] alkanes.
作者:Robert D. Bach、Mark W. Tubergen、Russell C. Klix
DOI:10.1016/s0040-4039(00)84850-9
日期:1986.1
Lewis acid catalyzed rearrangement of α,β-epoxy oximes proceeds by oxirane cleavage α to the oxime moiety with an attendant pinacol type alkyl migration to the resonance stabilized carbenium ion at Cα, affording a 1,3-diketo-monoxime.
The recently discovered novel concept of self-terminating, oxidative radical cyclizations, through which alkynes can be converted into carbonyl compounds under very mild reaction conditions usingO-centered inorganic and organicradicals as oxidants, is described.
描述了最近发现的自终止氧化自由基环化的新概念,通过该概念,炔烃可以在非常温和的反应条件下使用以 O 为中心的无机和有机自由基作为氧化剂转化为羰基化合物。