The present invention provides a flavor and fragrance composition which comprises, as the active ingredient, an optically active (1S)-8-mercaptomenthone having an S-form/R-form mixing ratio for the configuration at the 4-position in the range of from 65:35 to 95:5 by weight, wherein the flavor and fragrance composition is for use in food and beverage, fragrances and cosmetics, pharmaceuticals or oral compositions and the like; a product which is scented with the flavor and fragrance composition; and a method for enhancing or modulating odor of the flavor and fragrance composition by adding the optically active (1S)-8-mercaptomenthone.
A process for making squalene involving: (a) providing a hydrocarbon-containing intermediate product derived from a vegetable oil; (b) providing an extractant; and (c) extracting squalene-containing starting material from the hydrocarbon-containing intermediate product to form a squalene-containing raffinate phase and an extract phase.
Carboxylic acids and derivatives thereof and pharmaceutical compositions containing them
申请人:——
公开号:US20020049345A1
公开(公告)日:2002-04-25
The invention relates to carboxylic acids and derivatives thereof and pharmaceutical compound containing them. The active compounds are represented by the formula compound represented by formula I, wherin R
1
-R
4
each independently represents an unsubstituted or substituted hydrocarbyl or heterocyclyl radical, Q represents a diradical consisting of a linear chain of 11 to 18 carbon atoms, one or more of which may be replaced by heteroatoms, said chain being optionally substituted by inert substituents and one or more of said carbon or heteroatom chain members optionally forming part of a ring structure, and where one or both of de carboxyl groups can be substituted by an in vitro hydrolyzable physiologically acceptable substituent; with the proviso that: compounds wherein R
1
-R
4
each represents CH
3
and Q represents a linear chain of 14 carbons, are excluded; and compounds wherein Q represents a linear chain of carbon atoms one of which is replaced by oxygen or sulfur, are excluded.
1
PHOTOTHERMOGRAPHIC MATERIALS CONTAINING CO-DEVELOPERS WITH PHOSPHONIUM CATION
申请人:Simpson Sharon M.
公开号:US20080145788A1
公开(公告)日:2008-06-19
Incorporating a combination of a trisphenol reducing agent (developer) and a substituted olefinic co-developer having a phosphonium cation in photothermographic materials improves image tone in resulting images.
PHOTOCHROMIC AND ELECTROCHROMIC COMPOUNDS AND SYNTHESIS AND USE THEREOF
申请人:Branda Neil R.
公开号:US20100190868A1
公开(公告)日:2010-07-29
Novel photochromic and electrochromic hexadiene compounds are described. The compounds are reversibly convertible between ring-open and ring-closed isomeric forms as indicated in structures I(o) and I(c) below. (See formula in original abstract of application) The conversion between the different isomeric forms may be induced by light or electricity. In one embodiment the compounds may include a charge transfer moiety including electron donor and acceptor groups. The electron donor and acceptor are linearly conjugated in the ring-open form to enable electron transfer but are electrically insulated in the ring-closed form. Methods for synthesizing the compounds from photochemically and/or electrically inert precursors are also described. For example, the photoresponsive compounds may be synthesized by reacting diene precursors with dienophiles in a condensation reaction. The compounds may be utilized in reactivity-gated photochromic or electrochromic applications. In one embodiment of the invention, compounds of the invention may be used in a method to selectively release a releasable agent, such as a small molecule. According to this method, a photochemically inert precursor compound is reacted with the releasable agent to form a carrier compound comprising a switching moiety, the switching moiety being reversibly convertible between a thermally unstable form and a thermally stable form. The switching moiety may be selectively converted between the first and second forms to cause controlled release of the releasable agent from the carrier compound.