1 H -4,5-二氢咪唑鎓盐1容易与产生环状产物的亲核试剂反应,该环状产物可以是稳定的或转化为维持结构乙二胺单元的无环化合物。用甲基碘化镁化合物1e可得到预期的咪唑烷,但在取代的1-芳基-3-甲基-2-苯基盐1b-d的情况下,分离出N-芳基-N'-甲基乙二胺3b-d和苯乙酮(4) ,代表C-2单元向亲核碳转移的过程。与碱性氰化物盐1有效反应,得到α,α-二氨基腈5。在这些化合物中,氰基可以很容易地被亲核试剂(羟基阴离子,具有亲核碳的物质以及通过氢化物离子转移作用的试剂)取代,类似于盐,但收率更高。
The Facile Hydrolysis of Imidazolinium Chlorides (N‐Heterocyclic Carbene Precursors) Under Basic Aqueous Conditions
作者:Nedra Touj、Jerwin Jay Taping、Nikolay Tumanov、Johan Wouters、Lionel Delaude
DOI:10.1002/chem.202302402
日期:2023.12
The hydrolysis of imidazolinium chlorides takes place readily in a basic water/dichloromethane biphasic mixture at room temperature. Experimental conditions were optimized to afford full conversions and high yields of γ-aminoformamides starting from symmetrical or unsymmetrical substrates. Structural parameters that affect the resilience of these important NHC precursors in the presence of moisture
Synthetic and Degradative Investigations of the Structure of Folinic Acid-SF
作者:Margie May、Thomas J. Bardos、Frank L. Barger、Myra Lansford、Joanne M. Ravel、George L. Sutherland、William Shive
DOI:10.1021/ja01151a028
日期:1951.7
Preparation of D-Penicillamine. Reaction of Penilloic Acid, Penicilloic Acid a-Amides and Benzylpenicillin with N,N'-Diphenylethylenediamine
作者:Toshihisa Ogawa、Kazuyuki Tomisawa、Kaoru Sota
DOI:10.3987/com-88-4651
日期:——
Regitz, M.; Weise, G.; Lenz, B., Bulletin des Societes Chimiques Belges, 1985, vol. 94, # 7, p. 499 - 520
作者:Regitz, M.、Weise, G.、Lenz, B.、Foerster, U.、Urgast, K.、Maas, G.
DOI:——
日期:——
Dication disulfides by reaction of thioureas and related compounds with trifluoromethanesulfonic anhydride. The role of triflic anhydride as an oxidizing agent