Sur l'amino-5-benzoyl-4-méthyl-3-isoxazole: synthèse et transformation en dihydro-6,8-diméthyl-3,8-phényl-4-<i>7H</i>-isoxazolo[5,4-<i>e</i>]diazépin-1,4-one-7
作者:Roland Jaunin
DOI:10.1002/hlca.19740570706
日期:1974.11.6
On treatment with ammonia and benzaldehyde the benzalisoxazolone 3 does not give the aminoketone 7 as assumed by Speroni [1] but a product which has been shown to be identical with the enamine 8 prepared by Ried & Czack [4] from ethyl oximinoacetoacetate and benziminoethyl ether. Authentic aminoketone 7 was synthesized in a three-step procedure starting from the aminonitrile 19. Conversion of 7 into
Primary ethynamines (HC.tplbond.CNH2, PhC.tplbond.CNH2), aminopropadienone (H2NCH:C:C:O), and imidoylketene (HN:CHCH:C:O). Preparation and identification of molecules of cosmochemical interest
作者:Curt. Wentrup、Horst. Briehl、Primoz. Lorencak、Uwe J. Vogelbacher、Hans Wilhelm. Winter、Andre. Maquestiau、Robert. Flammang
DOI:10.1021/ja00213a002
日期:1988.3
Ethynamine (HO≡CNH) has been prepared from three different precursors (7a, 7b, and 8) by flash vacuum pyrolysis and observed by low-temperature infrared spectroscopy for the first time. The collision activation mass spectra (CAMS) strongly support the assignments. The Meldrum'sacidderivative 8 also gives rise to equilibrating imidoylketene (10) and aminopropadienone (9), observable by both IR and