摘要:
A method of manufacturing a compound represented by the formula R 1 C (OR 7 ) 3 is provided, wherein R 1 represents a C 1 -C 19 alkyl group and R 7 represents a C 1 -C 6 alkyl group.
摘要:
This invention pertains to perfluoropolyethers and perhalogenated chlorofluoroether polymers that can be prepared by fluorinating polymers made by the polymerization of acetals, ketals, polyacetals, polyketals and orthoesters with elemental fluorine.
wherein R₁ and R₂ are different or the same alkyl moieties and can be a saturated, unsaturated, branched, unbranched or cyclic alkyl moiety of 1-3 carbon atoms, are prepared by first anhydrously reacting hydrogen cyanide or a hydrogen cyanide derivative with a secondary alkanol and hydrogen chloride in the presence of an inert organic solvent. Upon the formation of the resulting imino ether hydrochloride, more secondary alkanol is added to form the ortho esters (I). 1,1-Dialkoxycycloalkanes of the structure
wherein R₁ and R₂ correspond to R₁ and R₂ of structure (I), and n is an integer from 4 to 9, are prepared by reacting with the imino ether hydrochloride more secondary alkanol and a cycloalkanone having 5 to 10 carbon atoms.
摘要:
This disclosure describes novel compounds which are useful as precursors in the synthesis of 9-oxo-11α, 16-dihydroxy-16-vinyl-5- cis -13- trans -prostadienoate esters which possess activity as hypotensive agents and/or as vasodilators.
摘要:
A method for manufacturing a compound represented by the formula (9) is provided: wherein R 2 represents a C 1 -C 4 alkyl group, R 3 represents a C 1 -C 6 alkyl group, R 4 and R 5 , independently from each other, represent a hydrogen atom, a C 1 -C 6 alkyl group or a phenyl group, or R 4 and R 5 together form a tetramethylene group, a pentamethylene group or an oxo group, and Ac represents an acetyl group.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung von 2-Chloro-1,1,1-trialkoxyethan (II) (monochlorierte Essigsäureorthoester) durch Umsetzung von 1,1,1-Trialkoxyethan (I) (Orthoessigsäureester) mit Chlor vorzugsweise in Gegenwart von Alkoholen und katalytischen Mengen einer Base.