Reformatsky reactions with N-arylpyrrolidine-2-thiones: synthesis of tricyclic analogues of quinolone antibacterial agents
作者:Joseph P Michael、Charles B de Koning、Gladys D Hosken、Trevor V Stanbury
DOI:10.1016/s0040-4020(01)00964-4
日期:2001.11
Abstract A convenientsynthesis of 5-oxo-1,2,3,5-tetrahydropyrrolo[1,2- a ]quinoline-4-carboxylic acids, tricyclic analogues of the quinolone antibiotics, is described. Key steps in the route are a novel zinc-mediated Reformatsky reaction between diethyl bromomalonate and N -arylpyrrolidine-2-thiones 18 , and cyclisation of the resulting diethyl pyrrolidinylidenemalonate intermediates 19 in polyphosphoric
Visible‐Light‐Mediated C(sp
<sup>3</sup>
)–H Thiocarbonylation for Thiolactam Preparation with Potassium Sulfide
作者:Wei Tan、Cuihong Wang、Xuefeng Jiang
DOI:10.1002/cjoc.201900360
日期:2019.12
thiolactam preparation with potassium sulfide via visible‐light‐mediated C(sp3)–H thiocarbonylation, in which polysulfide dianions and radical anions generated from potassium sulfide were the key active species. A variety of thiolactams were straightforward established under mild conditions. Moreover, it was successfully applied to structural modification of tetrahydroberberine.
Syntheses of alkyl (E)-(1-aryl-2-pyrrolidinylidene)acetates
作者:Joseph P. Michael、Gladys D. Hosken、Arthur S. Howard
DOI:10.1016/s0040-4020(88)90042-7
日期:1988.1
Reaction of thioamides with zinc enolate: Synthesis of vinylogous carbamates
作者:Hyeon Kyu Lee、Jia Kim、Chwang Siek Pak
DOI:10.1016/s0040-4039(99)00141-0
日期:1999.3
Eschenmoser sulfur extrusion reaction is failed to produce vinylogous carbamate II from N-(t-Boc)pyrrolidine-2-thion I but, treatment of methyl bromozincacetate with N-(t-Boc)pyrrolidine-2-thion I afforded good yield of vinylogous carbamate II. This thio-Reformatsky reaction appeared to be sensitive to the structure of substrates i.e. ring size or N-protecting groups. (C) 1999 Elsevier Science Ltd. All rights reserved.
MICHAEL, JOSEPH P.;HOSKEN, GLADYS D.;HOWARD, ARTHUR S., TETRAHEDRON, 44,(1988) N 10, 3025-3036
作者:MICHAEL, JOSEPH P.、HOSKEN, GLADYS D.、HOWARD, ARTHUR S.