
Journal of Organic Chemistry p. 4669 - 4681 (1983)
Update date:2022-08-04
Topics:
Tamaru, Yoshinao
Yamada, Yoshimi
Kagotani, Masahiro
Ochiai, Hirofumi
Nakajo, Eiji
et al.
The combination of a sulfonylpalladation of acyclic dienes 1 (with 2 equiv of NaSO2R and 1 equiv of PdCl2 in acetic acid or acetic acid-H2O at 50-80 deg C under air) and a protiodepalladation of the thus obtained <1-(sulfonylmethyl)-?-allyl>palladium complexes 3 with dimethylglyoxime (in a protic solvent at room temperature) provides di- and trisubstituted (Z)-Δ3-sulfones 12 selectively, irrespective of the stereochemistry of the starting dienes.Similar treatment of 1-vinylcycloalkenes 5 (n =6) provides the stereochemically defined (2-sulfonylethylidene)cycloalkanes 19, the formal 1,4-addition products of a sulfinic acid to s-cis-5, in high selectivity.The dienes 5 (n=8 and 10) are transformed to a mixture of 19 and 20.These regio- and stereoselectivities are rationalized uniformly by assuming a hydrolytic cleavage of the (?-allyl)palladium intermediate activated by an A(1,3) strain between Pd and the substituent on the allylic position.
View MoreContact:+86-15995924277
Address:WuZhongOu suzhou new south road 89
Changzhou Ruiping Chemical Co., Ltd
website:http://www.wishchem.com
Contact:+86-519-82324280
Address:No.288-1 Huacheng Road, Jintan
Hangzhou Dingyan Chem Co., Ltd
website:http://www.dingyanchem.com
Contact:86-571-87157530
Address:RM.1118,NO.1 Building, Baiyun Tower,Jianggan Area, Hangzhou city, China,310004
website:http://www.synchemie.com/
Contact:+86-574-87642758
Address:Room 901, Yinyi Bund Building, 132 Renmin Road
Contact:852-29282288
Address:HONGKONG
Doi:10.1016/S0022-328X(00)99558-5
(1986)Doi:10.1021/ol202547y
(2012)Doi:10.1021/ol2018328
(2011)Doi:10.1021/ja0576379
(2006)Doi:10.3987/COM-00-9141
(2001)Doi:10.1021/jm9018004
(2010)