A Novel Synthesis of Esters via Substitution of the Benzotriazolyl Group in 1-(Benzotriazol-1-yl)alkyl Esters with Organozinc Reagents
作者:Alan R. Katritzky、Stanislaw Rachwal、Bogumila Rachwal
DOI:10.1055/s-1991-26382
日期:——
Aldehydes are converted by thionyl chloride and benzotriazole into 1-(1-chloroalkyl)benzotriazoles which react with sodium carboxylates to give 1-(benzotriazol-1-yl)alkyl esters 3. In an alternative route, 3 are prepared by substitution of one of the acetoxy groups in acylals with benzotriazole. The benzotriazolyl moiety in 3 is substituted by an alkyl, an aryl or an alkynyl group upon treatment with an organozinc reagent in a new versatile synthesis of esters 4.
Reactivity of AllylSmBr/HMPA: Facile Synthesis of 3-Aryl-1,2,4-benzotriazines
作者:Ruifeng Yin、Liejin Zhou、Huili Liu、Hui Mao、Xin Lü、Xiaoxia Wang
DOI:10.1002/cjoc.201200989
日期:2013.1
3‐Aryl‐1,2,4‐benzotriazines were conveniently prepared in moderate to good yields from 1,l‐bis(benzotriazol‐1‐yl)methylarenes with allylsamarium bromide/hexamethylphosphramide (allylSmBr/HMPA). Preliminary results indicate that HMPA may enhance the reducing ability as well as prohibit the nucleophicility of allylSmBr, thus making allylSmBr/HMPA as a promising single‐electron transfer (SET) reagent
hane CHPh(btz)2 and tris(benzotriazol-1-yl)methane CH(btz)3 were used as N-donor ligands to prepare luminescent heteroleptic copper(I) complexes. [CuCHPh(btz)2}(PPh3)2][BF4] and [CuCHPh(btz)2}(DPEphos)][BF4] (DPEphos = bis[(2-diphenylphosphino)phenyl] ether) were obtained from the corresponding borohydride complexes [Cu(BH4)(PPh3)2] and [Cu(BH4)(DPEphos)] and tetrafluoroboric acid. [CuCH(btz)3}(PPh3)][BF4]
1,1-Bis(benzotriazolyl) derivatives as gem-dianion synthons
作者:Alan R. Katritzky、Clara N. Fali、Ming Qi
DOI:10.1016/s0040-4039(98)00346-3
日期:1998.4
Bis(benzotriazolyl)methylbenzenes la,b were converted by excess lithium metal in the presence of ketones into the 1,3-diols 3a-g in moderate to good yields. However, similar treatment of 5 gave only the mono reduction products 6, 7. Compounds la,b reacted with 1 equivalent of diketone 8 to form olefins 10a,b. (C) 1998 Elsevier Science Ltd. All rights reserved.
Katritzky, Alan R.; Kuzmierkiewicz, Wojciech; Rachwal, Bogumila, Journal of the Chemical Society. Perkin transactions I, 1987, p. 811 - 818
作者:Katritzky, Alan R.、Kuzmierkiewicz, Wojciech、Rachwal, Bogumila、Rachwal, Stanislaw、Thomson, Julie