Tetrahedron Letters p. 4025 - 4028 (1981)
Update date:2022-09-26
Topics:
Chan, Lam
Matlin, Stephen A.
The first example of carbenoid ring expansion of thiophene to a 2H-thiopyran has been observed in its Rh-catalysed reaction with benzhydryl 6-diazopenicillinate.Buchner ring expansion of anisole with the same carbenoid gives two isomeric methoxy-cycloheptatrienes by attact on the upper face of the β-lactam ring.In one of the isomers, the methoxyl group shows a strong conformational preference in solution, revealed by n.O.e. difference spectroscopy.
View MoreContact:+86-913-2223392
Address:No. 32, Xinanjing Road, Weinan City, Shaanxi Province, 714000, China
Shanghai Sunway Pharmaceutical Technology Co.,Ltd.
Contact:+86-21-5161 3915
Address:Shanghai YangPu
Zhejiang Chemicals Import & Export Corporation (ZHECHEM)
Contact:+86-571-87046953
Address:No. 37, Qingchun Road
Anhui Jiatiansen Agrochemical Co.,Ltd
Contact:15366811918
Address:chemical industrial park,xiangyu town,dongzhi county,anhui,china
Shandong Xingshun New Material Co., Ltd.
website:http://www.sd-xingshun.com
Contact:+86-519-86461196/+86-519-86464994
Address:Middle of Luhua East Road, Dingtao District
Doi:10.1081/SCC-120012983
(2002)Doi:10.1081/SCC-200034827
(2004)Doi:10.1016/j.tetlet.2004.09.112
(2004)Doi:10.1021/jo00133a029
(1982)Doi:10.1055/s-0037-1611708
(2019)Doi:10.3987/com-02-9603
(2003)