1217-08-9Relevant articles and documents
Preparation method of hexamethyl indane alcohol
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Paragraph 0058-0072, (2020/06/16)
The invention discloses a preparation method of hexamethyl indane alcohol. The method comprises the following steps: reacting 1, 1, 2, 3, 3-pentamethyl indane with allyl alcohol under the action of acatalyst, and carrying out continuous rectification to separate the product. The used catalyst is a supported Ru catalyst and is prepared from a Ru precursor, a ligand, a cocatalyst and a carrier. Thesupported Ru catalyst has the main advantages that hexamethyl indane alcohol is prepared through reaction of 1, 1, 2, 3, 3-pentamethyl indane and allyl alcohol, and the supported Ru catalyst is highin activity, good in selectivity, not prone to loss, easy to operate and good in economic benefit.
Process for preparing isochroman compounds
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, (2008/06/13)
High-purity isochroman compounds can be obtained in high yields according to a simple and economical process for preparing isochroman compounds, comprising the step of adding an aquesous solution of formaldehyde having a concentration of 40 to 70 wt. % to a complex of an arylalkanol represented by the following general formula (II) with a Friedel-Crafts catalyst to cyclize the arylalkanol: STR1 wherein R1 and R2 each stands for a hydrogen atom, a lower alkyl group or a lower alkoxyl group, or alternatively R1 and R2 are respectively bonded to adjacent carbon atoms with mutual bonding of R1 and R2 together with the carbon atoms respectively bonded to R1 and R2 to form a benzene ring, a naphthalene ring, or a C5 or C6 cycloalkane or cycloalkene which may have 1 to 6 lower alkyl groups; and R3 stands for a hydrogen atom or a lower alkyl group.
Process for the production of compounds useful in perfumery
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, (2008/06/13)
Process for producing compounds useful in perfumery including isochromans and acylated indane hydrocarbons with an alkylene oxide or with a lower acyl halide in the presence of a hydrocarbon or hydrocarbon mixture containing C5 to C10 alkanes at a temperature of from -20° C. up to -5° C. In the case of forming isochromans, the resulting alcohol is reacted, in situ, with a lower alkanol and a formaldehyde precursor at temperatures of from 20° C. up to 80° C.
