作者:Francisco Camps、Amadeu Llebaria、Josep Ma Moretó、Lluís Pagès
DOI:10.1016/s0040-4039(00)77687-8
日期:1992.1
The reaction of 1-bromomethyl-1-cycloalkenes and acetylenes in the presence of tetracarbonylnickel affords moderate to good yields of spirocyclopentenones in a regio and stereoselective process.
Asymmetric approaches to cyclopentenones in the Ni(0)-promoted cyclocarbonylation reaction of allyl halides and acetylenes
作者:Juan Manuel Villar、Antonio Delgado、Amadeu Llebaria、Josep M. Moretó、Elies Molins、Carles Miravitlles
DOI:10.1016/0040-4020(96)00573-x
日期:1996.7
Different approaches to the asymmetric synthesis of cyclopentenones by means of the Ni(CO)4-promoted alkyne-allyl halide cyclization-carbonylation are reported. The use of acetylenic sulfoxides 1 has proved effective for the synthesis of acyclic, fused [5+8], and spiro [5+5], [5+7], and [5+8] cyclopentenones, whereas placement of the aryl sulfoxide on the allylic system failed to afford any cycloadduct
The Stannum–Ene Reactions of Benzyne and Cyclohexyne with Superb Chemoselectivity for Cyclohexyne
作者:Lianggui Li、Chunhui Shan、Jiarong Shi、Wensheng Li、Yu Lan、Yang Li
DOI:10.1002/anie.202117351
日期:2022.4.19
The stannum–ene reactions of both benzyne and cyclohexyne were realized, which is particularly suitable for cyclohexyne with a broad substrate scope and excellent chemoselectivity.
Electrophile-Controlled Regiodivergent Palladium-Catalyzed Imidoylative Spirocyclization of Cyclic Alkenes
作者:Shumin Ding、Yue Pu、Jiao Lin、Haixia Zhao、Qiang Tang、Jian Wang
DOI:10.1021/acs.orglett.4c00181
日期:2024.3.8
spirocyclization of isocyano cycloalkenes has been developed, offering efficient and selective approaches toward spirocyclic hydropyrrole scaffolds. 2-Azaspiro-1,7-dienes could be obtained through a “chain-walking” process with aryl/vinyl iodides as electrophiles, while the normal Heck product 2-azaspiro-1,6-dienes were selectively generated when aryl triflates were used as the coupling partner of isocyanides
作者:Tsuyoshi Kitamura、Yuichi Kuzuba、Yoshihiro Sato、Hideaki Wakamatsu、Reiko Fujita、Miwako Mori
DOI:10.1016/j.tet.2004.05.030
日期:2004.8
Ring-opening metathesis and ring-closing metathesis (ROM-RCM) of cycloalkene-yne was demonstrated using a first- or second-generation ruthenium complex. When cycloalkenes bearing the alkyne part at the C-3 position were reacted with a first-generation ruthenium-carbene complex under an atmosphere of ethylene, ROM-RCM proceeded smoothly to give skeletal reorganized products in good yields. In this reaction, cycloalkene-ynes having terminal alkyne were suitable. On the other hand, when cycloalkenes bearing the alkyne part at the C-1 position were treated with a second-generation ruthenium-carbene complex, ROM-RCM proceeded smoothly to give bicyclic compounds and/or dimeric compounds in good yields. (C) 2004 Elsevier Ltd. All rights reserved.