Rapid Library Synthesis of Amphiphiles Based On a Dioxinone Scaffold and Identification of Nonlamellar Liquid Crystals
摘要:
Linear and branched amphiphiles with different lengths of lipids and different numbers of hydroxyl groups were rapidly synthesized based on a dioxinone scaffold. The liquid crystalline (LC) properties of the synthesized amphiphiles in excess water were investigated by polarizing optical microscopy and small-angle X-ray scattering (SAXS) analysis. Novel -keto ester based amphiphiles that formed non-lamellar, inverted LC phases were identified.
Rapid Library Synthesis of Amphiphiles Based On a Dioxinone Scaffold and Identification of Nonlamellar Liquid Crystals
摘要:
Linear and branched amphiphiles with different lengths of lipids and different numbers of hydroxyl groups were rapidly synthesized based on a dioxinone scaffold. The liquid crystalline (LC) properties of the synthesized amphiphiles in excess water were investigated by polarizing optical microscopy and small-angle X-ray scattering (SAXS) analysis. Novel -keto ester based amphiphiles that formed non-lamellar, inverted LC phases were identified.
effect of glycerylesters of acetoaceticacid on the rectalabsorption of insulin and inulin was studied. A decrease in the serum glucose level was observed in rabbits following the administration of an insulin suppository containing glyceryl-1,3-diacetoacetate (adjuvant II) or 1,2-isopropylideneglycerine-3-acetoacetate (adjuvant IV). The promoting effects of adjuvants II and IV on the rectal absorption
Ethylacetoacetate enamines of phenylalanine and phenylglycine enhanced the rectal absorption of macromolecular drugs such as lysozyme and heparin in rabbits. Glycerine-1, 3-diacetoacetate, 1, 2-isopropylideneglyceryl-3-acetoacetate and ethylacetoacetylglycolate also enhanced the rectal absorption of lysozyme and heparin. Lysozyme is a basic compound and heparin is an acidic compound, so the non-surfactant adjuvants used in this study can promote the rectal absorption of macromolecular compounds irrespective of their electrochemical properties. The coadministration of calcium ion inhibited the adjuvant action, so complex formation of the adjuvant with calcium ion may occur, reducing the efficacy of these compounds as adjuvants.
[EN] SALTS OF AMPHETAMINE-HOMOARGININE CONJUGATE PRODRUG<br/>[FR] SELS DU PROMÉDICAMENT CONJUGUÉ AMPHÉTAMINE-HOMOARGININE
申请人:SHIRE PHARMACEUTICALS INC
公开号:WO2019199724A1
公开(公告)日:2019-10-17
Disclosed are improved amphetamine-homoarginine conjugate salts, including compositions thereof. These amphetamine-homoarginine conjugate salts and compositions are useful for treating certain disorders, such as attention deficit hyperactivity disorder (ADHD), ADD, as well as fatigue, cognitive dysfunction, and/or inattention associated with various disorders.
A pouch designed for administration of an active ingredient in the oral cavity is disclosed, the pouch containing an amount of one or more cannabinoids. Also, pouches for use as a medicament, for use in alleviation of pain, and for use in mitigation of appetite deficiency are disclosed. Further, a method of alleviation of pain and a method of mitigation of appetite deficiency using the pouch are disclosed.
Spirolactones from Dirhodium(II)-Catalyzed Diazo Decomposition with Regioselective Carbon-Hydrogen Insertion
作者:Michael P. Doyle、Alexey B. Dyatkin
DOI:10.1021/jo00115a018
日期:1995.5
Dirhodium(II) caprolactamate, Rh-2(cap)(4), catalyzes diazo decomposition of cycloalkylmethyl diazoacetates which form spirolactones in moderate to high yield by insertion into a tertiary carbon-hydrogen bond. Similar results are obtained with diazoacetates derived from tetrahydropyran-2-methanol and tetrahydrofurfuryl alcohol but not from cyclopropylmethanol. With tetrahydrofuran-3-ylmethyl diazoacetate, Rh-2(cap)(4) catalysis promotes delta-lactone formation via insertion into the oxygen-activated secondary C-H bond instead of gamma-lactone formation by carbene insertion into the unactivated tertiary C-H bond. However, when both 1,5- and 1,6-positions are activated for insertion by adjacent oxygen atoms, as in (2,2-dimethyl-1,3-dioxolan-4-yl)methyl diazoacetate, five-membered ring formation occurs exclusively in Rh-2(cap)(4)-catalyzed reactions, whereas use of dirhodium(II) acetate leads to both insertion products.