Heterocyclic Communications p. 449 - 452 (2008)
Update date:2022-09-26
Topics:
Truong, Phong
Kennedy, G. Davon
Vasquez, Pedro C.
Baumstark
Addition of methyl- or phenyllithium to 3,4,4,5-tetrasubstituted-4H- pyrazoles (1a-b) smoothly produced the extremely air-sensitive anions of 4,5-dihydro-3,4,4,5,5-pentasubstituted-1H-pyrazoles (2a-c) which were converted to the N-tosylated compounds 3a-c in low to very good yields by reaction with tosyl fluoride. The two-step process is a convenient one-pot route to 4,5-dihydro-N-tosyl-1H-pyrazoles.
JIN TAN CHENG'EN CHEMICAL CO.,LTD.
Contact:86-519-82116250
Address:NO.102，village Dongfang，conomic development zone
Hangzhou Bayee Chemical Co.,Ltd.
Contact:+86-571-86990109
Address:No.380, Jiangnan Auenue, Binjiang District, Hangzhou, China
Shanghai Kefu Chemical Co.,Ltd.
Contact:+86-21-34616196
Address:Room601-602, Xuhui Business Building, No.168, Yude Road, Shanghai
Zhengzhou Xinlian Chemical Tech Co. ,Ltd
Contact:0371-65771781 021-52042910
Address:H Part, Building I, No. 700 Gonglu Road, Pudong New Area, Shanghai
website:http://www.easchem.com
Contact:+86-731-89722861 89722891
Address:2/F-4/Bld Colorful Palace, No.605 Changsha Ave, Yuhua Area Changsha Hunan China.
Doi:10.1007/s13738-016-0868-0
(2016)Doi:10.1080/00304940902958545
(2009)Doi:10.1080/10426500902930167
(2009)Doi:10.1021/jo1014382
(2010)Doi:10.1021/cc900112s
(2010)Doi:10.1021/jm00126a031
(1989)
