Patent classifications
C07C69/757
Synthesis of 20-nor-salvinorin A
The invention provides 20-nor-salvinorin A, an analog of the kappa-opioid agonist salvinorin A. The 20-nor-salvinorin A is an active kappa-opioid modulator and can be used for treatment of medical conditions wherein modulation of the kappa-opioid receptor is medically indicated, such as pain, pruritis, depression, or inflammation, or conditions implicating perception and consciousness. 20-nor-salvinorin A can be less additive when used in treatment compared to a mu-opioid receptor agonist, and 20-nor-salvinorin A is more stable in vivo than is parent compound salvinorin A. The invention further provides synthetic intermediates and procedures for preparation of 20-nor-salvinorin A.
COMPOUND AND METHOD FOR PRODUCING THE SAME, RESIN COMPOSITION, RESIN SHEET, MULTILAYER PRINTED WIRING BOARD, AND SEMICONDUCTOR DEVICE
A compound (A) of the present invention is represented by the formula (1): wherein each R.sub.1 independently represents a group represented by the formula (2) or a hydrogen atom, and each R.sub.2 independently represents a hydrogen atom or a linear or branched alkyl group having 1 to 6 carbon atoms, provided that at least one R.sub.1 is a group represented by the formula (2); and wherein -* represents a bonding hand.
PROCESS FOR PREPARING 1-INDANONE COMPOUNDS BY INTRAMOLECULAR FRIEDEL-CRAFTS REACTION OF ALPHA,ALPHA-DIALKYLMALONATE DERIVATIVES
Described herein are valuable new chemical intermediates for producing perfuming ingredients, and a process for producing compound of formula (I).
PROCESS FOR PREPARING 1-INDANONE COMPOUNDS BY INTRAMOLECULAR FRIEDEL-CRAFTS REACTION OF ALPHA,ALPHA-DIALKYLMALONATE DERIVATIVES
Described herein are valuable new chemical intermediates for producing perfuming ingredients, and a process for producing compound of formula (I).
Insect repellent compounds and compositions, and methods thereof
The present invention relates to monoterpenoid and phenylpropanoid containing derivative compounds, methods of making the compounds, compositions comprising the compounds, and methods of repelling pests using the compounds and/or compositions.
Insect repellent compounds and compositions, and methods thereof
The present invention relates to monoterpenoid and phenylpropanoid containing derivative compounds, methods of making the compounds, compositions comprising the compounds, and methods of repelling pests using the compounds and/or compositions.
CANNABINOID DERIVATIVES AND PRECURSORS, AND ASYMMETRIC SYNTHESIS FOR SAME
The present disclosure relates to new cannabinoid derivatives and precursors and catalytic asymmetric processes for their preparation. The disclosure also relates to pharmaceutical compositions and pharmaceutical and analytical uses of the new cannabinoid derivatives. For instance, the disclosure relates to the preparation of new precursors, and the use of such precursor compounds for the preparation of isotope labelled cannabinoid products using chiral and achiral catalysts and catalytic processes. The deuterium, carbon-13 and carbon-14 containing compounds can be prepared and purified prior to transformation to the desired individual deuterated cannabinoid products.
CANNABINOID DERIVATIVES AND PRECURSORS, AND ASYMMETRIC SYNTHESIS FOR SAME
The present disclosure relates to new cannabinoid derivatives and precursors and catalytic asymmetric processes for their preparation. The disclosure also relates to pharmaceutical compositions and pharmaceutical and analytical uses of the new cannabinoid derivatives. For instance, the disclosure relates to the preparation of new precursors, and the use of such precursor compounds for the preparation of isotope labelled cannabinoid products using chiral and achiral catalysts and catalytic processes. The deuterium, carbon-13 and carbon-14 containing compounds can be prepared and purified prior to transformation to the desired individual deuterated cannabinoid products.
Preparation method for S-indoxacarb
A catalyst and a method for preparing S-indoxacarb using the catalyst. The catalyst is prepared using 3-tert-butyl-5-(chloromethyl)salicylaldehyde and cyclohexanediamine as raw materials, where an original quinine catalyst such as cinchonine is replaced with the catalyst for application in the asymmetric synthesis of tert-butyl hydroperoxide and 5-chloro-2-methoxycarbonyl-1-indanone ester, greatly improving selection in the asymmetric synthesis process, with the S-enantiomer content increasing from 75% to over 98%, achieving the recycling of a high-efficiency chiral catalyst, and greatly reducing production costs. The synthesis process of the catalyst is simple and is favorable for industrialization, and lays good foundations for the production of high-quality indoxacarb.
Preparation method for S-indoxacarb
A catalyst and a method for preparing S-indoxacarb using the catalyst. The catalyst is prepared using 3-tert-butyl-5-(chloromethyl)salicylaldehyde and cyclohexanediamine as raw materials, where an original quinine catalyst such as cinchonine is replaced with the catalyst for application in the asymmetric synthesis of tert-butyl hydroperoxide and 5-chloro-2-methoxycarbonyl-1-indanone ester, greatly improving selection in the asymmetric synthesis process, with the S-enantiomer content increasing from 75% to over 98%, achieving the recycling of a high-efficiency chiral catalyst, and greatly reducing production costs. The synthesis process of the catalyst is simple and is favorable for industrialization, and lays good foundations for the production of high-quality indoxacarb.