Enantiodivergent synthesis of a decalin type of chiral building blocks and their application to terpenoid synthesis
作者:Naoki Toyooka、Akira Nishino、Takefumi Momose
DOI:10.1016/s0040-4020(97)00315-3
日期:1997.5
An enantiomeric pair of a decalin type of chiral building blocks bearing an oxygenated angular substituent has been synthesized by the lipase-mediated ring differentiation of a meso decahydronaphthalene glycol system Its synthetic utility has been demonstrated by the formal synthesis of (-)-polygodial, (-)-warburganal, (-)-drimenin, and (-)-elemol. (C) 1997 Elsevier Science Ltd.
The synthesis of chiral decalones, (−)-1,1,4a-trimethyl-2-decalol and (+)-geosmin from S-(+)-carvone (part 3)
作者:Henk J. Swarts、Anja A. Haaksman、Ben J.M. Jansen、Aede de Groot
DOI:10.1016/s0040-4020(01)88303-4
日期:1992.1
The cholesterol biosynthesis inhibitor (−),1,1,4a-trimethyl-2-decalol (4), the chiral decalones 6 and 7, and (+)-geosmin (9 were synthesized from S-(+)-carvone. Annelation of S-(−)-dihydrocarvone followed by methylation gave compound 8 which was used as a key intermediate for the synthesis of decalol 4 and ketone 5. A short isomerisation-ozonation sequence was developed for the removal of the isopropenyl
Ring differentiation of the trans-decahydronaphthalene system via chemo-enzymatic dissymmetrization of its σ-symmetric glycol: Synthesis of a highly functionalized chiral building block for the terpene synthesis
作者:Naoki Toyooka、Akira Nishino、Takefumi Momose
DOI:10.1016/0040-4039(93)88079-x
日期:1993.7
The asymmetric ring differentiation by lipase-catalyzed transesterification of a meso decahydronaphthalenediol (1) was accomplished in extremely high optical and chemical yield. The absolute stereochemistry of the corresponding mono-acetate(-)-2 was determined by its conversion into a decalone [(-)-31 and to an octalone [(+)-4], which were key intermediates for the synthesis of (-)-polygodial, (-)-warburganal, and (-)-drimenin.