The generation and trapping of organozinc carbenoids from N-diethoxymethyl amides: a new amidocyclopropanation reaction
作者:Guillaume Bégis、David Cladingboel、William B. Motherwell
DOI:10.1039/b309887g
日期:——
Amidocyclopropanes are readily prepared by reaction of N-diethoxymethyl amides with alkenes in the presence of zinc amagalm, zinc chloride and chlorotrimethylsilane.
Observations on the direct amidocyclopropanation of alkenes using organozinc carbenoids
作者:William B. Motherwell、Guillaume Bégis、David E. Cladingboel、Laure Jerome、Tom D. Sheppard
DOI:10.1016/j.tet.2007.03.027
日期:2007.7
A series of amidocyclopropanes were prepared by directamidocyclopropanation of alkenes, usingorganozinccarbenoids generated from readily available diethoxymethylamides. The amidocyclopropanation of monosubstituted alkenes led to selective formation of the trans-amidocyclopropane in most cases, but with more substituted alkenes, the stereochemical outcome of the cyclopropanation reactions was unpredictable
A Rapid Route to Aminocyclopropanes via Carbamatoorganozinc Carbenoids
作者:Shingo Ishikawa、Tom D. Sheppard、Jarryl M. D'Oyley、Akio Kamimura、William B. Motherwell
DOI:10.1002/anie.201304720
日期:2013.9.16
methyl carbamate, triethyl orthoformate, and readily available alkenes provides a highly practical preparation of protected aminocyclopropanes. The reaction proceeds with preferential cis addition to alkenes, and cleavage of the methyl carbamate gives the free aminocyclopropanes as their HI salts (see scheme).
简单如 1,2,3:氨基甲酸甲酯、原甲酸三乙酯和容易获得的烯烃的反应提供了一种高度实用的受保护氨基环丙烷制备方法。该反应通过优先顺式加成到烯烃进行,氨基甲酸甲酯的裂解得到游离氨基环丙烷作为它们的 HI 盐(参见方案)。
Synthesis of Lactam-containing Amido(ethoxy)methylphosphonates
作者:M. V. Livantsov、A. A. Prishchenko、O. P. Novikova、L. I. Livantsova、Ya. N. Koval'、D. P. Krut'ko
DOI:10.1023/b:rugc.0000042441.37114.fd
日期:2004.6
promising ligands and biologicallyactivecompounds [1]. In the present work we propose a convenientsynthesis of amido(ethoxy)methylphosphonates I containing pyrrolidone and valeroand caprolactams fragments. Hence N-diethoxymethyllactams A react with diethyl trimethylsilyl and diethyl hydrogen phosphites at 130 150 C in the presence of zinc chloride to form phosphonates I. Using diethyl trimethylsilyl phosphite
内酰胺的有机磷衍生物作为有前景的配体和生物活性化合物受到关注[1]。在目前的工作中,我们提出了一种方便合成含有吡咯烷酮和戊内酰胺和己内酰胺片段的氨基(乙氧基)甲基膦酸酯 I。因此,N-二乙氧基甲基内酰胺 A 在氯化锌存在下于 130 150 C 与二乙基三甲基甲硅烷基和亚磷酸氢二乙酯反应形成膦酸二乙酯。低得多。
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作者:A. B. Koldobskii、V. E. Vakhmistrov、E. V. Solodova、O. S. Shilova、V. N. Kalinin