Carbohydrate Research p. 157 - 160 (1998)
Update date:2022-08-29
Topics:
Singh, Ashok Kumar
Chopra, Deepti
Rahmani, Shahla
Singh, Bharat
The kinetics of Pd(II) catalysed oxidation of Ara, Xyl and Gal by N-bromosuccinimide (NBS) in acidic medium has been studied using Hg(OAc)2 as a scavenger for the Br- ion. The reaction data show that first-order kinetics in each pentose and hexose at low concentrations tend to zero-order at high concentrations. First-order kinetics with respect to NBS and Pd(II) and inverse fractional order, i.e., decreasing effect of [H+] and [Cl-], were observed, whereas ionic strength, Hg(OAc)2 and succinimide did not influence the oxidation rate. Various activation parameters have been calculated and recorded. The corresponding acids, arabonic, xylonic and galactonic, were identified as the main oxidation products of the reactions. On the basis of the experimental findings, a suitable mechanism has been proposed. Copyright (C) 1998 Elsevier Science Ltd.
View MoreZhejiang PRIMAR Import & Export Trade Co., Ltd.
Contact:86-570-3630818
Address:No.1Puzhuyuan,Quhua,Zhejiang Province,China324004
Contact:+86-13914766747
Address:Floors 21&22, Jin Cheng Tower, No. 216 Middle Longpan Road, Nanjing
Suzhou CarbonWell Pharma-Tech Co., Ltd
Contact:Tel: + 86 (0)512-8898-1216; + 86-18606258602
Address:2358 Changan Road, Wujiang Scientific Innovation Park, Wujiang, Jiangsu Province, P. R. China 215200
Jiangsu Willing Bio-Tech Co ltd
website:http://www.willingbio.com/
Contact:+86 18796909136
Address:No 18 Guoqiao Road
Qingdao XinYongAn Chemicals Co., Ltd
Contact:+86-532-81107967
Address:Chengyang dual-port industrial park by the sea,Qingdao
Doi:10.1016/j.bmcl.2005.06.077
(2005)Doi:10.1016/j.tetlet.2016.12.049
(2017)Doi:10.1016/S0040-4039(98)02063-2
(1998)Doi:10.1002/ardp.19853180206
(1985)Doi:10.1002/ejoc.200700829
(2007)Doi:10.1016/j.jallcom.2010.03.165
(2010)