Reactions of organozinc reagents derived from dialkyl 2,2-dibromomalonates with 3-aryl-2-cyanoprop-2-enamides
摘要:
Organozinc compounds obtained by treatment of dialkyl 2,2-dibromomalonates with metallic zinc reacted with N-substituted 3-aryl-2-cyanoprop-2-enoic acid amides to give alkyl 3-R-6-aryl-5-cyano-2,4-dioxo-3-azabicyclo[3.1.0]hexane-1-carboxamides as a single stereoisomer.
Highly stereoselective synthesis of 1-cyanocyclopropane-carboxamides from 3-substituted-2-cyanoacrylamides with N -tosylhydrazones under metal-free conditions
作者:Xufeng Nie、Yachuan Wang、Lijun Yang、Zaijun Yang、Tairan Kang
DOI:10.1016/j.tetlet.2017.05.070
日期:2017.8
lamides with N-tosylhydrazones has been successfully developed. This strategy provide a simple route to the synthesis of very valuable 1-cyanocyclopropanecarboxamides with a quaternarystereogeniccenter in good yields and with high diastereoselectivities (up to 90% yield with 19:1 dr). The reaction could be performed in one-pot fashion and in a gram-scale from aryl aldehydes.
highly functionalized hydroisoquinolines by trienamine-mediated [4+2]-cycloaddition/nucleophilic ring-closing reaction cascade sequence of cyanoacrylamides with 2,4-dienals is presented. The corresponding cycloadducts are formed in high yields and excellent stereoselectivities. Moreover, a series of transformations demonstrate the synthetic application of the obtained hydroisoquinolines.
Reaction of organozinc reagents prepared from bromomalonic acid esters and zinc with 3-aryl-2-cyanopropenoic acid primary amides
作者:V. V. Shchepin、P. S. Silaichev、Yu. G. Stepanyan、N. Yu. Russkikh、M. I. Vakhrin、M. A. Ezhikova、M. I. Kodess
DOI:10.1134/s1070428006110054
日期:2006.11
Organozinc compounds prepared from bromomalonic acid esters and zinc react with 3-aryl-2-cyanopropenoic acid primary amides giving a single diastereomer of the corresponding 1-R'-4-aryl-2,6-dioxo-5-cyanopiperidine-3-carboxylic acid esters, or 3-R'-6-aryl-2,4-dioxo-5-cyano-3-azabicyclo[3.1.0]hexene-1-carboxylic acid esters.
Waghmare, Smita R., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2021, vol. 60, # 6, p. 849 - 855
作者:Waghmare, Smita R.
DOI:——
日期:——
Reactions of organozinc reagents derived from dialkyl 2,2-dibromomalonates with 3-aryl-2-cyanoprop-2-enamides
作者:V. V. Shchepin、P. S. Silaichev、Yu. G. Stepanyan、M. I. Vakhrin
DOI:10.1134/s1070363206060156
日期:2006.6
Organozinc compounds obtained by treatment of dialkyl 2,2-dibromomalonates with metallic zinc reacted with N-substituted 3-aryl-2-cyanoprop-2-enoic acid amides to give alkyl 3-R-6-aryl-5-cyano-2,4-dioxo-3-azabicyclo[3.1.0]hexane-1-carboxamides as a single stereoisomer.