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Volumn 21, Issue 12, 2010, Pages 2327-2339

Diastereoselective synthesis of β-piperonyl-γ-butyrolactones from Morita-Baylis-Hillman adducts. highly efficient synthesis of (±)-yatein, (±)-podorhizol and (±)-epi-podorhizol

Author keywords

Diastereoselectivity; Lignans; Morita Baylis Hillman

Indexed keywords


EID: 78649712114     PISSN: 01035053     EISSN: 16784790     Source Type: Journal    
DOI: 10.1590/S0103-50532010001200021     Document Type: Article
Times cited : (11)

References (115)
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    • For some outstanding examples concerning the use of Morita-Baylis-Hillman as substrate for natural products and drugs synthesis, see
    • For some outstanding examples concerning the use of Morita-Baylis-Hillman as substrate for natural products and drugs synthesis, see: Amarante, G. W.; Cavallaro, M.; Coelho, F.; Tetrahedron Lett. 2010, 51, 2597;
    • (2010) Tetrahedron Lett. , vol.51 , pp. 2597
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    • and references cited therein
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    • It is well known that the reduction of carbonyl compounds with NaBH4 in 2-propanol is very slow. We test this experimental condition in order to improve the diastereoselectivity we have attained with methanol. Unfortunately, the diastereoselective ratio was poorer. Most probably this result should be due to the moderate solubility of our ketoesters in 2-propanol. To some comments concerning the reduction of carbonyl compounds with NaBH4 in different solvents, see
    • It is well known that the reduction of carbonyl compounds with NaBH4 in 2-propanol is very slow. We test this experimental condition in order to improve the diastereoselectivity we have attained with methanol. Unfortunately, the diastereoselective ratio was poorer. Most probably this result should be due to the moderate solubility of our ketoesters in 2-propanol. To some comments concerning the reduction of carbonyl compounds with NaBH4 in different solvents, see: Brown, H. C.; Mead, E. J.; Subba Rao, B. C.; J. Am. Chem. Soc. 1955, 75, 6209;
    • (1955) J. Am. Chem. Soc. , vol.75 , pp. 6209
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    • 4, followed by the treatment with HBr in 62% yield for two steps
    • 4, followed by the treatment with HBr in 62% yield for two steps.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.