Organometallic reactions. Part X. The preparation and reactions of some alkynyl-lead compounds
作者:Alwyn G. Davies、R. J. Puddephatt
DOI:10.1039/j39680000317
日期:——
Trialkylalkynyl-lead compounds have been prepared by treating trialkyl-lead methoxides with alkynes, and by thermal decarboxylation of trialkyl-lead alkynylcarboxylates.
Synthesis of 1,2-five-ring-annellated barrelenesvia the intramolecularDiels-Alder reaction of acetylenic derivatives
作者:Latchezar S. Trifonov、Alexander S. Orahovats
DOI:10.1002/hlca.19870700708
日期:1987.11.4
The intramolecularDiels-Alderreaction conducted with acetylenic acylureas, obtained from carbodiimides, and the acetylenic acid 5 and its derivatives 13 gave the 1,2-annellated barrelene 14 (from 13a) and the benzobarrelenes 8 (from 5) and 15 (from 13b); in the case of 3-butynoic acid (1),[1,3]-H shift were observed. The formation of the azabarrelenes 16 (from 13c) as an intermediate is postulated
Some addition reactions of N-tributylstannyldiphenylmethyleneamine
作者:P. G. Harrison
DOI:10.1039/p19720000130
日期:——
synthesised from reaction between diphenylmethyleneamine and the acceptor reagent The addition of chloral to the aldehyde adducts results in the elimination of aldehyde and the formation of the chloral adduct; except in the case of the bromal adduct, where further addition takes place. Addition also appears to take place with iso(thio)cyanates; equilibria being established in some cases.
Singled out: Treatment of ketones with carbodiimides in the presence of a catalytic amount of either [HMn(CO)4}3] or [Mn2(CO)10] gave amides in good to excellent yields. In this reaction, the carbon–carbon single bond of a ketone is cleaved efficiently. The reaction also proceeded by using isocyanates instead of carbodiimides.
Copper(II) Acetate/Oxygen-Mediated Nucleophilic Addition and Intramolecular CH Activation/CN or CC Bond Formation: One-Pot Synthesis of Benzimidazoles or Quinazolines
作者:Hua-Feng He、Zhi-Jing Wang、Weiliang Bao
DOI:10.1002/adsc.201000469
日期:2010.11.22
Diarylcarbodiimides or benzylphenylcarbodiimides are converted to 1,2-disubstituted benzimidazoles or 1,2-disustituted quinazolines via addition/intramolecular CH bondactivation/C-N or CC bond forming reaction using copper(II) acetate/oxygen [Cu(OAc)2/O2] as the oxidant at 100 °C in one-pot cascade procedure.
使用乙酸铜(II)/氧[Cu(OAc)2 / O 2)通过加成/分子内CH键活化/ CN或CC键形成反应将二芳基碳二亚胺或苄基苯基碳二亚胺转化为1,2-二取代的苯并咪唑或1,2-取代的喹唑啉以一锅级联程序在100°C下作为氧化剂。