Oxokohlenstoffe und verwandte Verbindungen; 14. Mitteilung.<sup>1</sup>Chemie der Semiquadratsäure: Reaktive Semiquadratsäure-Abkömmlinge und deren Umsetzung mit<i>N</i>-Nucleophilen
作者:Arthur H. Schmidt、Michael Debo、Bernhard Wehner
DOI:10.1055/s-1990-26842
日期:——
Oxocarbons and Related Compounds; Part 14. The Chemistry of Semisquaric Acid: Highly Reactive Semisquaric Acid Derivatives and Their Reactions with N-Nucleophiles Starting from semisquaric acid (1), the semisquaric esters 6a-d and semisquaric chloride (7) were prepared. Reaction of 6c or 7 with amines as well as the method of mixed anhydrides, starting from 1, afforded the semisquaric amides 10a-n (Methods A, B, C, respectively). The semisquaric amides 10g,h,i were also obtained by the reaction of semisquaric chloride (7) with the trimethylsilylamines 11a-c (Method D); 10h was furthermore prepared by the DCC-method (Method E). The reaction of butyl squarate (6c) with hydrazines and N-alkylhydroxylamines afforded the semisquaric hydrazides 13a-d and the semisquaric hydroxylamides 15a-c, respectively.
氧碳化合物及相关化合物;第14部分,半方酸的化学:高反应性的半方酸衍生物及其与N-亲核试剂的反应
从半方酸(1)出发,合成了半方酸酯6a-d和半方酸氯化物(7)。6c或7与胺的反应,以及从1出发的混合酸酐法,分别得到了半方酸酰胺10a-n(方法A、B、C)。半方酸酰胺10g,h,i也是通过半方酸氯化物(7)与三甲基硅氨(11a-c)的反应获得的(方法D);10h进一步通过DCC法(方法E)合成。丁基方酸酯(6c)与肼和N-烷基羟胺的反应分别得到半方酸肼(13a-d)和半方酸羟胺(15a-c)。