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Volumn 16, Issue 12, 2012, Pages 1905-1916

The manufacture of a homochiral 4-silyloxycyclopentenone intermediate for the synthesis of prostaglandin analogues

Author keywords

[No Author keywords available]

Indexed keywords

AMINE SALTS; CYCLOPENTENONES; ENZYMATIC RESOLUTIONS; HOMOCHIRAL; SITU RECYCLING; WITTIG REACTION;

EID: 84871601208     PISSN: 10836160     EISSN: 1520586X     Source Type: Journal    
DOI: 10.1021/op300188x     Document Type: Article
Times cited : (27)

References (41)
  • 26
    • 0039926409 scopus 로고
    • Facile, autocatalytic decomposition (contact with only 0.2 equiv of ylide caused full decomposition) of the 4-silyloxy substituent via deprotonation α- to the aldehyde was proposed to be responsible for its base sensitivity. By contrast, when the 4-silyloxy substituent is absent, successful Wittig reaction with the identical ylide is possible (see Armstead, D. A.; Mann, J. Synth. Commun. 1985, 15, 1147)
    • (1985) Synth. Commun. , vol.15 , pp. 1147
    • Armstead, D.A.1    Mann, J.2
  • 27
    • 0031491564 scopus 로고    scopus 로고
    • See Ahrgren, L.; Sutin, L. Org. Process Res. Dev. 1997, 1, 425 for a description of a Sharpless asymmetric dihydroxylation on an industrial scale
    • (1997) Org. Process Res. Dev. , vol.1 , pp. 425
    • Ahrgren, L.1    Sutin, L.2
  • 30
    • 0023546991 scopus 로고
    • The addition of metalated derivatives of 1-bromo-2,2-dimethoxyethane to furfural, in an analogous fashion to that report Collins, P. W.; Kramer, S. W.; Gullikson, G. W. J. Med. Chem. 1987, 30, 1952 for a homologue of aldehyde 4 has shown promise.
    • (1987) J. Med. Chem. , vol.30 , pp. 1952
    • Collins, P.W.1    Kramer, S.W.2    Gullikson, G.W.3
  • 38
    • 84856195259 scopus 로고    scopus 로고
    • From a toxicological and environmental standpoint, 1,4-dioxane is an undesirable solvent; see Laird, T. Org. Process Res. Dev. 2012, 16, 1
    • (2012) Org. Process Res. Dev. , vol.16 , pp. 1
    • Laird, T.1
  • 39
    • 0033966783 scopus 로고    scopus 로고
    • Its impact was reduced by its use at only moderate volume/weight ratios (∼5-7 v/w) with an approximately equal portion of water. No 1,4-dioxane was detected in the target compounds by headspace GC analysis. Although the Piancatelli rearrangement has been reported to proceed in aq acetone, it was reported(32) to provide "poor yields" and "extremely low rate" when the substituent α- to the hydroxyl group was non-aromatic. Unfortunately solubility proved to be a constraint when using a completely aqueous system; see D'Auria, M. Heterocycles 2000, 52, 185 for the rearrangement.
    • (2000) Heterocycles , vol.52 , pp. 185
    • D'Auria, M.1
  • 40
    • 84871590723 scopus 로고    scopus 로고
    • U.S. Patent 7,109,371, (and refs 31 and 33 herein)
    • In related prostaglandin analogue syntheses using similar conditions, yields of 40-72% for the sequential rearrangement and isomerisation have been reported; see Clissold, D. W.; Craig, S. W.; Gadikota, R. R.; He, M.; Jurayj, J. F.; Kazerani, S.; Rannala, E.; Sharma, P. K. U.S. Patent 7,109,371, 2006, (and refs 31 and 33 herein). Addition of 0.1-110 mol% hydroquinone, conducting the reaction in the dark or under an inert atmosphere have so far proven unhelpful. A future solvent screen to eliminate the use of dioxane altogether, or to minimise its volume further, should focus on water-miscible ethers or alcohols (transesterification needs to be taken into account), and a reinvestigation of the use of acetone is required.
    • (2006)
    • Clissold, D.W.1    Craig, S.W.2    Gadikota, R.R.3    He, M.4    Jurayj, J.F.5    Kazerani, S.6    Rannala, E.7    Sharma, P.K.8


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.