Diaxial Diureido Decalins as Compact, Efficient, and Tunable Anion Transporters
摘要:
Decalins bearing two axial -NHCONHAr substituents and an ester-linked alkyl side chain have been synthesized and studied as anion receptors and transporters. The design relates to steroid-based "cholapods" but is more compact and less intrinsically lipophilic. Transport rates depend on both NHAr and the alkyl side chain. High activities can be achieved; with optimal substitution, chloride-nitrate exchange across vesicle membranes is measurable at transporter/lipid ratios as low as 1:250000.
Sunscreen compositions are described which contain certain substituted naphthalenylidenes which act as UV filters when incorporated in a carrier in amounts ranging from 0.1-50% by weight.
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.
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.
Jones, J. Bryan; Dodds, David R., Canadian Journal of Chemistry, 1987, vol. 65, p. 2397 - 2404
作者:Jones, J. Bryan、Dodds, David R.
DOI:——
日期:——
JONES, J. BRYAN;DODDS, DAVID R., CAN. J. CHEM., 65,(1987) N 10, 2397-2404