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Volumn 64, Issue 3, 1999, Pages 707-712

Ring expansion of diazo-functionalized 4-hydroxycyclobutenone: Catalytic ring opening and recyclization to 2(5H)-furanone/cyclopentenedione and thermal 4π-8π electrocyclic ring opening-closure to diazepinedione

Author keywords

[No Author keywords available]

Indexed keywords

CYCLOPENTENE DERIVATIVE; DIAZEPINE DERIVATIVE; FURANONE DERIVATIVE;

EID: 0033524882     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo980523d     Document Type: Article
Times cited : (24)

References (42)
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    • Squarate 2 was not suitable since the nucleophilic addition did not occur at -78°C. Furthermore, α-diazo carbonyl compounds were used since derivatives of diazoalkane such as (trimethylsilyl)diazomethane were too unstable [decomposition during workup gave only 12% of the cyclopentenedione (13: R = TMS) as a product].
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    • In an exception, the (Z)-isomer was a minor product in the Rh-catalysis of 12a (entry 6), probably because of coordination with a Rh center.
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    • For the synthesis of these types of compounds from 1, see (a) Reed, M. W.; Polart, D. J.; Perri, S. T.; Foland, L. D.; Moore, H. W. J. Org. Chem. 1988, 53, 2477. (b) Liebeskind, L. S.; Fengl, R. W.; Wirtz, K R.; Shawe, T. T. J. Org. Chem. 1988, 53, 2482.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.