Identity of 3,4-dimethylenethiophene reactive intermediates from diazene and bis-allene precursors. Correlation of singlet biradical reactivity in the tetramethyleneethane and trimethylenemethane series.
作者:Marc M. Greenberg、Silas C. Blackstock、Jerome A. Berson
DOI:10.1016/s0040-4039(00)96480-3
日期:1987.1
The relative reactivities of the 3,4-dimethylenethiophene intermediates 1 from the deazetation of the diazene 5 and from the intramolecular cyclization of bisallenyl sulfide 3, determined by competition experiments, serve as a “fingerprint” to show that the same reactive transient is generated from both precursors.
Heterocyclization of Bis(2-chloroprop-2-en-1-yl)sulfide in Hydrazine Hydrate–KOH: Synthesis of Thiophene and Pyrrole Derivatives
作者:Igor B. Rozentsveig、Valentina S. Nikonova、Victor V. Manuilov、Igor A. Ushakov、Tatyana N. Borodina、Vladimir I. Smirnov、Nikolay A. Korchevin
DOI:10.3390/molecules27206785
日期:——
products are discussed. Obtained hydrazone of 5-methylidene-3-methyldihydrothiophen-2-one was used for the synthesis of a range of azine derivatives and in oxidation process with SeO2. The found reactions open up expedient approaches to the formation of various hardly accessible thiophene and pyrrole compounds from 2,3-dichloropropene and elemental sulfur as starting reagents.
本文致力于双(2-氯丙-2-烯-1-基)硫化物的杂环化,其在水合肼-碱介质中进行并导致噻吩和吡咯衍生物的形成:先前描述的 4,5,9,10-四氢环八[1,2-c;5,8-c']二噻吩,以及5-亚甲基-3-甲基二氢噻吩-2-酮和1-氨基-2-(丙炔基硫烷基丙烯基硫烷基)-3,5-二甲基吡咯的未知腙. 讨论了形成杂环产物的初步机制。获得的 5-methylidene-3-methyldihydrothiophen-2-one 腙用于合成一系列吖嗪衍生物,并用于与 SeO 2的氧化过程. 发现的反应开辟了从 2,3-二氯丙烯和元素硫作为起始试剂形成各种难以接近的噻吩和吡咯化合物的便捷方法。
Synthesis and properties of ten-membered cyclodiynes with one or two hetero atoms
作者:Gleiter, Rolf、Rittinger, Stefan、Langer, Heinrich
DOI:——
日期:——
Heterocyclic aromatic non-Kekule molecules. Synthesis and solution-phase chemistry of the singlet biradicals 3,4-dimethylenefuran and 3,4-dimethylenethiophene
作者:Keith J. Stone、Marc M. Greenberg、Silas C. Blackstock、Jerome A. Berson