Journal of Organic Chemistry p. 8864 - 8872 (2017)
Update date:2022-08-04
Topics: NMR Analysis
Huang, Adrian
Wo, Kellie
Lee, So Yeun Christine
Kneitschel, Nika
Chang, Jennifer
Zhu, Kathleen
Mello, Tatsiana
Bancroft, Laura
Norman, Natalie J.
Zheng, Shao-Liang
A systematic study of the N-substitution reactions of 3-substituted pyrazoles under basic conditions has been undertaken. Regioselective N1-alkylation, -arylation, and -heteroarylation of 3-substituted pyrazoles have been achieved using K2CO3-DMSO. The regioselectivity is justified by the DFT calculations at the B3LYP/6-31G??(d) level. A consistent steric effect on chemical shift has been observed for N-alkyl pyrazole analogues. Twenty-five X-ray crystallographic structures have been obtained to confirm the regiochemistry of the major products.
View MoreContact:86-379-63338609
Address:Jiudian Village,Deting Town,Song County,Luoyang
Contact:+86-27-85733560
Address:NO.308,QINGNIAN RD.,WUHAN,CHINA
Sanming Coffer Fine Chemical Industrial Co., Ltd
website:http://www.cofferxm.com/
Contact:+86-598-5853979
Address:Jin-sha Yuan Chuang-ye Park,Hi-Tech Development Zone,Sanming City P.R.China
Onlychem (Jinan)Biotech Co.,Ltd
Contact:86-531-83175885
Address:No. 44, Honglou South Road, Jinan,China
RongCheng K&S Chemical Co.,Ltd
Contact:0631-7336369
Address:rongcheng ,shandong province china
Doi:10.1007/BF00475305
()Doi:10.1016/j.tetlet.2008.07.153
(2008)Doi:10.1021/ol0165995
(2001)Doi:10.1080/10426500213344
(2002)Doi:10.1016/S0040-4039(01)84864-4
(1972)Doi:10.1021/ja01250a043
(1943)