Carbohydrate Research p. 267 - 281 (1997)
Update date:2022-08-05
Topics:
El Nemr, Ahmed
Tsuchiya, Tsutomu
Previous papers [10-12] reported new reactions that occur when some carbohydrate triflates are treated with MeLi (or BuLi) in Et2O to give the C-methyl(butyl) or unsaturated compounds through elimination of the CH-hydrogen bearing a CF3SO3 group ( α-elimination) as a proton. This paper extends the previous work and describes the reactions for some 3-O-triflyl-D-gluco- and -allo-furanosides and -pyranosides with (t)BuOK and pyridine [instead of Me(Bu)Li], utilizing the corresponding 2- and 3-deuterated analogs. It was found that, when (t)BuOK was used, the 3-O-triflyl-D-glucopyranosides gave 2,3- and 3,4-unsaturated compounds through a-hydrogen elimination (a-elimination) followed by (possibly) C-3 carbene formation, while the 3-O-triflyl-D-allopyranosides gave mainly 2,3-unsaturated compounds through p-elimination. When pyridine was used, most of the compounds gave the corresponding 3-pyridinium derivatives through an SN2 process.
View MoreJiaxing Carry Bio-Chem Technology Co.,Ltd
website:http://www.carrybiotech.com
Contact:0573-82788958
Address:Add.Fl 3th, Pharm Vally,Kaichuang Rd, Xiuzhou District, Jiaxing, Zhejiang,314031,China
Zhengzhou Xinlian Chemical Tech Co. ,Ltd
Contact:0371-65771781 021-52042910
Address:H Part, Building I, No. 700 Gonglu Road, Pudong New Area, Shanghai
Chengda Pharmaceuticals Co., Ltd.
Contact:+86-573-84601188
Address:hengshan Road 5# in Jiashan, zhejiang
Jiangsu Jiuri Chemical Co.,Ltd.
Contact:+86-519-82118868
Address:Tianwang Town, Jurong City, Jiangsu Province, China
JIANGXI ZHANGFENG CHEMICAL CO., LTD.
Contact:+86-0799-3413066
Address:Xiyuan village, Xiabu Town, Xiangdong District
Doi:10.1016/j.bmcl.2009.10.139
(2010)Doi:10.3184/030823409X439744
(2009)Doi:10.1021/ja9106226
(2010)Doi:10.1021/ic9021118
(2010)Doi:10.1016/j.bmcl.2009.10.117
(2010)Doi:10.1021/jo902661y
(2010)