FIRST CARBAMOYLOXA-BRIDGED CYCLOPHANE - SYNTHESIS AND CRYSTAL-STRUCTURES OF 2 ISOLABLE CONFORMERS

Authors
IRIE S YAMAMOTO M IIDA I NISHIO T KISHIKAWA K KOHMOTO S YAMADA K
Citation
S. Irie et al., FIRST CARBAMOYLOXA-BRIDGED CYCLOPHANE - SYNTHESIS AND CRYSTAL-STRUCTURES OF 2 ISOLABLE CONFORMERS, Journal of organic chemistry, 59(5), 1994, pp. 935-937
Citations number
38
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of organic chemistry → ACNP
ISSN journal
00223263
Volume
59
Issue
5
Year of publication
1994
Pages
935 - 937
Database
ISI
SICI code
0022-3263(1994)59:5<935:FCC-SA>2.0.ZU;2-S
Abstract
Conformational control of a cyclophane with intermolecular hydrogen bo nding was accomplished through the first synthesis of a carbamoyloxa-b ridged cyclophane 3, with the result that the crystal structures of tw o isolable conformers 3a and 3b were elucidated to be anti-(E,E) and a nti-(Z,Z) by X-ray analysis. The convenient conversion of 3a to 3b was carried out with hydrogen bonding assisted by polar solvents.