Tandem Michael addition/isocyanide insertion into the C–C bond: a novel access to 2-acylpyrroles and medium-ring fused pyrroles
作者:Lingjuan Zhang、Xianxiu Xu、Qiu-rong Shao、Ling Pan、Qun Liu
DOI:10.1039/c3ob41793j
日期:——
A new reaction model, tandem Michael addition/formal isocyanide insertion into the acyl C–C bond, has been developed. Thus, a series of 2-acylpyrroles and seven-/eight-membered ring fusedpyrroles were synthesized from the reaction of methyl isocyanides with enones in a single operation.
A Formal (4 + 2) Cycloaddition of Phosphorus Ylides: Synthesis of Aromatic and Heteroaromatic 1,2-Diesters and Diones
作者:Palani Manikandan、Rudrasenan Agneswaran、Vinayagam Pavunkumar、Arasambattu K. Mohanakrishnan
DOI:10.1021/acs.orglett.2c01234
日期:2022.7.1
Heteroarylmethylenephosphorus ylides underwent Michael addition with alkynediones and alkynediesters, followed by intramolecular cyclization and elimination of triphenylphosphine oxide to afford 1,2-diaroylbenzenes and 1,2-alkoxycarbonylcarbo- and heterocycles. The analogous (4 + 2) cycloaddition led to the formation of 2,3-diaroylquinolines.
TIXONOVA L. G.; TITOVA E. I.; GAVRILOV L. D.; VERESHCHAGIN L. I.; PRAJDAK+, ZH. ORGAN. XIMII <ZORK-AE>, 1975, 11, HO 12, 2510-2514,
作者:TIXONOVA L. G.、 TITOVA E. I.、 GAVRILOV L. D.、 VERESHCHAGIN L. I.、 PRAJDAK+
DOI:——
日期:——
Synthesis of 3-(1,2-dioxoethyl)- and 2,3-dicarbonyl-containing pyrroles
作者:Alexey V. Galenko、Alexander F. Khlebnikov、Mikhail S. Novikov、Margarita S. Avdontceva
DOI:10.1016/j.tet.2015.02.030
日期:2015.4
preparation of 3-heterocyclyl pyrroles and pyrroles fused with heterocycles. The influence of catalysts and the reaction conditions on the yields of pyrroles and the regioselectivity of the reaction were studied. Experimental and theoretical results suggest that the reaction proceeds via the formation of an intermediate azirine–metal complex and subsequent nucleophilic N–C3 bond cleavage.