Journal of the Chemical Society. Perkin transactions I p. 705 - 713 (1996)
Update date:2022-08-03
Topics:
Jones, David W.
Nongrum, Firstborn Matthew
Unlike o-quinodimethanes lacking a bridge between the termini of the diene system e.g. 18a (n = 3 or 4), the 2-benzopyran-3-ones 10a, 10b and 10c undergo endo-selective intramolecular Diels-Alder addition of the connecting chain to give cis-BC fused ring systems of type 13. The adduct 13b is converted into the ester 21 with methanolic HCl and into the ketol 36 by LiAlH4 reduction followed by oxidation (MnO2). The ketone 31 is prepared from 21 by epoxidation followed by BF3·Et2O-catalysed rearrangement; with NaOMe-CD3OD it fails to undergo cis-trans isomerisation and fails to incorporate deuterium at C-8 probably due to the overwhelming acidity of the C-6 protons. The cis-dihydronaphthalene 26 obtained from 21 gives cis-21 with KOBut-(CD3)2SO showing the greater thermodynamic stability of the cis-fused ring system in this case.
View Morepuyang hongda shengdao new material co.,ltd.
Contact:+86-393- 4896278
Address:No.29 East Zhongyuan Road
Wuhan Yitongtai Science and Technology Co.,Ltd.
Contact:+86-27-88933550
Address:27th Fl. Bldg. 1, Shuian International Mansion, Heping Ave, Wuhan, Hubei, China
qingdao goldenchem imp and exp co.,ltd.
Contact:532-55579246
Address:no.62 ,haier road laoshan distirct
LIAOYANG WANRONG CHEMICALS COMPANY LIMITED
Contact:86-419-2390789
Address:XINLI VILLAGE , DONG NINGWEI COUNTY,TAIZIHE DISTRICT, LIAOYANG , LIAONING
Wuhan Shangrisyn chemicals Technology Co.,Ltd(expird)
Contact:+86-027-84466317 __ +86-15387123698
Address:wuhan - china
Doi:10.1016/S0040-4039(01)82475-8
(1974)Doi:10.1002/anie.200390132
(2003)Doi:10.1021/ja01858a049
(1940)Doi:10.1039/c1jm11154j
(2011)Doi:10.1021/ja01321a037
(1934)Doi:10.1021/ja01161a092
(1950)
