ORGANIC SYNTHESES VIA TRANSITION-METAL COMPLEXES .77. 2-BUTENE-1,4-DIONES BY PHOTOINDUCED ACYL MIGRATION OF ([2-(ACYLOXY)ETHENYL]CARBENE)CHROMIUM COMPLEXES

Authors
AUMANN R JASPER B
Citation
R. Aumann et B. Jasper, ORGANIC SYNTHESES VIA TRANSITION-METAL COMPLEXES .77. 2-BUTENE-1,4-DIONES BY PHOTOINDUCED ACYL MIGRATION OF ([2-(ACYLOXY)ETHENYL]CARBENE)CHROMIUM COMPLEXES, Organometallics, 14(3), 1995, pp. 1461-1465
Citations number
61
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Organometallics → ACNP
ISSN journal
02767333
Volume
14
Issue
3
Year of publication
1995
Pages
1461 - 1465
Database
ISI
SICI code
0276-7333(1995)14:3<1461:OSVTC.>2.0.ZU;2-C
Abstract
Photolysis of [(Z)-2-(acyloxy)ethenyl]carbene complexes (CO)(5)Cr=C(OE t)CH=C(OCOR(1))R [(Z)-3] (R = C6H5, t-Bu, c-Pr; R(1) = C6H5, c-Pr, c-C 7H7CH2, t-Bu, Me(2)C=CH) with UV light of >300 nm affords 2-butene-1,4 -diones R(1)COC(OEt)=CHCOR [(E)-6] (60-68%), by a novel metal-mediated acyl migration. Compounds (Z)-6 and furans 7 are formed as minor prod ucts.