Synthesis of 2-Alkyl-1,4-naphthoquinones by Alkylboration
作者:Bernd Peter Ernst、Hartmut Laatsch
DOI:10.1055/s-1992-26136
日期:——
By reaction of 1,4-naphthoquinone (1) and trialkylboranes in the presence of oxygen and oxidative work-up, sterically hindered 2-alkyl-1,4-naphthoquinones and, on addition of magnesium bromide, 2,3-bisalkyl-1,4-naphthoquinones are obtained.
Treatment of dimethyl ketene with ethoxyacetylene 1a, 1-ethoxyoct-1-yne 1b, and 1-ethoxytetrade-1-yne 1c afforded the 3-ethoxycyclobutenones 2a–c. Hydrolysis of 2a–c with dilute hydrochloric acid gave the cyclobutane-1,3-diones 3a–c. The 1H NMR spectra of these compounds indicate that in CDCl3 solution 2,2-dimethylcyclobutane-1,3-dione 3a exists as the diketone, whereas the 2,2,4-trialkylcyclobutane-1
与乙氧基乙炔二甲基烯酮的治疗1A,1- ethoxyoct -1-炔1B和1- ethoxytetrade -1-炔1C,得到3- ethoxycyclobutenones 2a-c中。用稀盐酸将2a–c水解,得到1,3-环丁烷3a–c。这些化合物的1 H NMR光谱表明,在CDCl 3溶液中,存在2,2-二甲基环丁烷-1,3-二酮3a作为二酮,而2,2,4-三烷基环丁烷-1,3-二酮3b和3c存在。作为单烯醇。
Hydroboration of Olefins with Catecholborane at Room Temperature in the Presence of <i>N,N</i>-Dimethylacetamide
作者:Christine E. Garrett、Gregory C. Fu
DOI:10.1021/jo960386p
日期:1996.1.1
Production of triorganoboroxines
申请人:CALLERY CHEMICAL CO
公开号:US03010989A1
公开(公告)日:1961-11-28
Jigajinni, Veerappa B.; Paget, Walter E.; Smith, Keith, Journal of Chemical Research - Part S
作者:Jigajinni, Veerappa B.、Paget, Walter E.、Smith, Keith