Magnesium Nitride as a Convenient Source of Ammonia: Preparation of Primary Amides
作者:Gemma E. Veitch、Katy L. Bridgwood、Steven V. Ley
DOI:10.1021/ol801398z
日期:2008.8.21
The use of magnesium nitride (Mg 3N 2) as a convenient source of ammonia has been explored for the direct transformation of esters to primary amides. Methyl, ethyl, isopropyl, and tert-butyl esters are converted to the corresponding carboxamides in good yields (75-99%).
Amidation of esters assisted by Mg(OCH3)2 or CaCl2
作者:Mark W. Bundesmann、Steven B. Coffey、Stephen W. Wright
DOI:10.1016/j.tetlet.2010.05.075
日期:2010.7
Magnesium methoxide (Mg(OCH3)2) and calcium chloride have been shown to facilitate the direct aminolysis of esters by ammonia to primary amides. Methyl, ethyl, isopropyl, and tert-butyl esters were converted to the corresponding carboxamides in good yields. Reactions have been run on a larger scale and without the safety liability inherent in the use of magnesium nitride (Mg3N2). Ammonium chloride
甲醇镁(Mg(OCH 3)2)和氯化钙已被证明可以促进氨将酯直接氨解为伯酰胺。将甲基,乙基,异丙基和叔丁基酯以良好的产率转化为相应的羧酰胺。反应已进行了较大规模,并且没有使用氮化镁(Mg 3 N 2)时固有的安全隐患。氯化铵和胺盐酸盐已成功用于代替甲醇与甲醇镁。
Catalyst-free hydrophosphination of alkenes in presence of 2-methyltetrahydrofuran: a green and easy access to a wide range of tertiary phosphines
reaction that is free of base, acid and catalyst, using only 2-methyltetrahydrofuran as additive has been performed. A new family of mono-, di-, tri- and tetra-phosphines compounds are obtained in good to excellent yields by adding diphenylphosphine to alkenes, mono- and polyfunctional acrylics (based on acrylate and methacrylate motifs) and acrylamide substrates. Addition of four equivalent of bio-mass
Chemically-tagged mitsunobu reagents for use in solution-phase chemical library synthesis
作者:Gale W. Starkey、John J. Parlow、Daniel L. Flynn
DOI:10.1016/s0960-894x(98)00431-4
日期:1998.9
A general method for high-throughput product purification of Mitsunobu reactions is described. Tagged phosphine and azodicarboxylate reagents are used to synthesize individual library members in solution-phase. Workup and purification are easily accomplished by post-reaction sequestration of the tagged reagents and reagent byproducts by a complementary functionalized ion exchange resin. The reagents are utilized in a 3 step library synthesis. (C) 1998 Elsevier Science Ltd. All rights reserved.
Preparation of Polymer Conjugates of Therapeutic, Agricultural, and Food Additive Compounds
申请人:Konradi W. Andrei
公开号:US20080031848A1
公开(公告)日:2008-02-07
This invention provides an improved synthesis of polymer conjugates of formula (I),
of agricultural, therapeutic, and food additive compounds. In particular, a process is described for the preparation of conjugates by treating primary or secondary alcohol substituents of active compounds with polymeric nucleophiles using “Mitsunobu” or related reaction conditions.