Asymmetric synthesis of (1'R,3R,4R)-4-acetoxy-3-[1'-((tert-butyldimethylsilyl)oxy)ethyl]-2-azetidinone and other 3-(1'-hydroxyethyl)-2-azetidinones from (S)-(+)-ethyl 3-hydroxybutanoate: formal total synthesis of (+)-thienamycin
Synthesis of organophosphorus compounds via silyl esters of phosphorous acids
作者:Kamyar Afarinkia、Charles W. Rees、John I.G. Cadogan
DOI:10.1016/s0040-4020(01)87899-6
日期:1990.1
The addition of trimethylsilyloxy phosphorus (III)derivatives generated in situ to imines at room temperature provides a mild selective and high yielding route to α-aminoalkylphosphorate and α-aminoalkylphenylphosphinate esters. Isocyanates and carbodiimides react similarly to give phosphonoureas and phosphonoguarnidines respectively aldehydes and ketones are much less reactive and cyanides are inert
New and efficient approaches to the semisynthesis of taxol and its C-13 side chain analogs by means of β-lactam synthon method
作者:Iwao Ojima、Ivan Habus、Mangzhu Zhao、Martine Zucco、Young Hoon Park、Chung Ming Sun、Thierry Brigaud
DOI:10.1016/s0040-4020(01)91210-4
日期:1992.1
Highly efficient chiral ester enolate-imine condensation giving 3-hydroxy-4-aryl-β-lactams with excellent enantiomericpurity is successfully applied to the asymmetric synthesis of the enantiomerically pure taxol C-13 side chain, N-benzoyl-(2R,3S)-3-phenyl-isoserine and itsanalogs. (3R,4S)-N-benzoyl-3-(1-ethoxyethoxy)-4-phenyl-2-azetidinone readily derived from the 3-hydroxy-4-phenyl-β-lactam is coupled
Stereoisomeric Styryl-substituted Pyrrolidines, 3,7-Diazobicyclo[3.3.0]octanes and 2-Styrylpyrroles from Cinnamaldehyde Iminium-N-methanide 1,3-Dipoles
作者:Richard N. Butler、Derval M. Farrell
DOI:10.1039/a706737b
日期:——
The reaction of cinnamaldehyde N-aryliminium methanide 1,3-dipoles with dimethyl maleate, dimethyl fumarate and some N-arylmaleimides gives equal mixtures of stereoisomeric substituted pyrrolidines and a route to 2-styrylpyrroles with dimethyl acetylenedicarboxylate.
First example of the cascade acylation/IMDAV/ene reaction sequence, leading to N-arylbenzo[f]isoindole-4-carboxylic acids possessing anti-viral activity
作者:Alexander A. Voronov、Kseniia A. Alekseeva、Elena A. Ryzhkova、Vladimir V. Zarubaev、Anastasia V. Galochkina、Vladimir P. Zaytsev、Mahesh S. Majik、Santosh G. Tilve、Atash V. Gurbanov、Fedor I. Zubkov
DOI:10.1016/j.tetlet.2018.02.015
日期:2018.3
The reaction between readily accessible N-aryl-3-phenylallylamines and maleic anhydride led to unexpected products – polysubstituted hydrogenated benzo[f]isoindole-4-carboxylic acids. This transformation proceeds through a previously unknown sequence of steps: N-acylation of the allylamine with maleic anhydride, intramolecular Diels-Alder reaction of the vinylarene in the intermediate N-maleamide,
易于获得的N-芳基-3-苯基烯丙基胺与马来酸酐之间的反应产生了意想不到的产物-多取代的氢化苯并[ f ]异吲哚-4-羧酸。:这种转变通过的步骤的以前未知的序列前进Ñ与马来酸酐,在中间的乙烯基芳烃的分子内Diels-Alder反应的烯丙胺的酰化Ñ -maleamide,并且前两个步骤的产物的阿尔德烯反应。选定的苯并[ f ]异吲哚显示出抗病毒活性。
Synthesis, Molecular Structure, Fluxional Behavior, and Tricarbonyliron Transfer Reactions of (η4-1-Azabuta-1,3-diene)tricarbonyliron Complexes
作者:Hans-Joachim Knölker、Gerhard Baum、Norbert Foitzik、Helmut Goesmann、Peter Gonser、Peter G. Jones、Herbert Röttele
(η4-1-azabuta-1,3-diene)tricarbonyliron complexes 10 are easily prepared in high yield by condensation of the corresponding arylamines 7 with the cinnamaldehydes 8 and subsequent ultrasound-promoted complexation of the resulting 1-azabuta-1,3-dienes 9 with nonacarbonyldiiron. The complexes 10 are shown to represent excellent reagents for the transfer of the tricarbonyliron fragment onto cyclohexa-1