Synthesis of pseudopeptidic (S)-6-amino-5-oxo-1,4-diazepines and (S)-3-benzyl-2-oxo-1,4-benzodiazepines by an Ugi 4CC Staudinger/aza-Wittig sequence
作者:Paulina Lecinska、Nazaret Corres、Daniel Moreno、María García-Valverde、Stefano Marcaccini、Tomás Torroba
DOI:10.1016/j.tet.2010.06.062
日期:2010.8
Sequential Ugi reaction between p-substituted arylglyoxals, alkylamines, cyclohexyl isocyanide and 3-azido-(S)-2-(tert-butoxycarbonylamino)propanoic acid, followed by a Staudinger/aza-Wittig cyclization in the presence of triphenylphosphine, gave rise to enantiomerically pure N-cyclohexyl 4-alkyl-2-aryl-5-oxo-(S)-6-(tert-butoxycarbonylamino)-4,5,6,7-tetrahydro-1H-1,4-diazepine-3-carboxamides, that
对位取代的芳基乙二醛,烷基胺,环己基异氰化物和3-叠氮基-(S)-2-(叔丁氧基羰基氨基)丙酸之间的顺序Ugi反应,然后在三苯基膦的存在下进行Staudinger / aza-Wittig环化反应对映体纯N-环己基4-烷基-2-芳基-5-氧-(S)-6-(叔丁氧羰基氨基)-4,5,6,7-四氢-1 H -1,4-二氮杂-3-羧酰胺,可用于新药设计。按相同的顺序,对位取代的苯甲醛,2-氨基二苯甲酮,环己基异氰酸酯和(S)-3-苯基-2-叠氮基丙酸产生N-环己基2-((S)-3-苄基-2-氧代-5-苯基-2,3-二氢-1 H-苯并[ e ] [1,4]二氮杂-1-基)-(R / S)-2-芳基乙酰胺。