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Volumn 7, Issue 24, 2001, Pages 5286-5298

Total synthesis of (-)-salicylihalamide

Author keywords

Cross coupling; Macrocycles; Metathesis; Natural products; Ruthenium

Indexed keywords

ESTERS; OLEFINS; PALLADIUM; RUTHENIUM COMPOUNDS; SYNTHESIS (CHEMICAL);

EID: 0035905656     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3765(20011217)7:24<5286::AID-CHEM5286>3.0.CO;2-G     Document Type: Article
Times cited : (175)

References (105)
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    • It has recently been argued that salicylihalamide is not the metabolite of the sponge itself but likely the product of a microbial inhabitant thereof, cf. ref. [3].
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    • note
    • a) It should be pointed out, however, that concomitant reduction of the C=C double bond is avoided only if the alkene is tri-substituted; in contrast to the results reported in ref. [27a], a disubstituted alkene is not inert under the reaction conditions;
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    • It is essential to quench the reaction mixture by addition of ethyl vinyl ether in order to inactivate the catalyst prior to work-up.
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    • For previous examples showing the influence of remote substituents on the stereochemical outcome of RCM, see for example: a) A. Fürstner, K. Langemann, J. Org. Chem. 1996, 61, 3942-3943;
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    • note
    • d) it should be pointed out that the changed stereochemical course during the cyclization of the O-protected diene 25c versus that of the O-unprotected substrates 25a, b does not reflect an increased thermodynamic stability of the corresponding (E)-cycloalkene 26c relative to its (Z)-isomer. Semiempirical calculations (MNDO(AM1)) indicate that in both cases the corresponding (E)-alkenes are thermodynamically slightly more stable. We thank Dr. K. Angermund for carrying out these calculations.
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    • note
    • Note that the (Z,Z)-configurated amide 42 is rather labile and that in the paper of Porco et al. (ref. [15]) only E,E-configurated dienoic acid amides have been cross coupled.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.