Synthesis of 1-hydroperoxy-1′-alkoxyperoxides by the iodine-catalyzed reactions of geminal bishydroperoxides with acetals or enol ethers
作者:Alexander O. Terent'ev、Maxim M. Platonov、Igor B. Krylov、Vladimir V. Chernyshev、Gennady I. Nikishin
DOI:10.1039/b809661a
日期:——
give previously unknown structures of 1-hydroperoxy-1'-alkoxyperoxides in yields up to 64%. The same compounds are formed in the iodine-catalyzed reactions of geminal bishydroperoxides with enol ethers. The nature of the solvent has a decisive influence on the formation of 1-hydroperoxy-1'-alkoxyperoxides. In the series of Et(2)O, THF, EtOH, CHCl(3), CH(3)CN, and hexane, the best results were obtained
A compound of the formula (I): ##STR1## salt thereof, or hydrate thereof which can effectively be absorbed from the lymph vessel in the intestinal tract and transferred to the lymph node in a high concentration is provided.
A simple, one-flask transformation of ketones to N-methyl lactams
作者:Robert V. Hoffman、James M. Salvador
DOI:10.1016/s0040-4039(00)74345-0
日期:1991.11
A one-flask conversion of cyclic ketones to N-methyl lactams is described. Reaction of the ketone with triethylorthoformate generates an acetal which is reacted in situ with N-(((p-nitrobenzene)sulfonyl)oxy methylamine 2a(CH3NH-OSO2C6H4NO2). Dealkylation of the resulting O-ethyl imidate with sodiumiodide gives the lactam. A variety of lactams, including macrocyclic lactams, are produced simply and
描述了环状烧瓶到N-甲基内酰胺的单烧瓶转化。酮与原甲酸三乙酯反应生成缩醛,该缩醛与N-(((对硝基苯)磺酰基)氧基甲胺2a(CH 3 NH-OSO 2 C 6 H 4 NO 2)原位反应。亚胺酸乙酯与碘化钠制得内酰胺,可以简单,高收率地生产各种内酰胺,包括大环内酰胺。
Iron(III) Tosylate in the Preparation of Dimethyl and Diethyl Acetals from Ketones and <font> <b>β</b> </font>-Keto Enol Ethers from Cyclic <font> <b>β</b> </font>-Diketones
作者:Horacio Mansilla、María M. Afonso
DOI:10.1080/00397910802219361
日期:2008.7.24
Abstract An efficient method for conversion of ketones to their corresponding dimethyl and diethyl acetals and of cyclic β-diketones into β-keto enol ethers using Fe(OTs)3 as a catalyst is described.
A variety of polyhydro-6-aryl- and heteroarylcycloalka[b][1,5] naphthyridines have been efficiently prepared by thermally induced ring contraction of pyrido[2,3-b][1,5]thiazepines obtained by reacting lithiated 2-chloro-N-cycloalkylidene-3-pyridinimines with suitable O-ethyl thiocarboxylates.