摘要:
A method of preparing fluoromethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether (sevoflurane) and structurally related monofluoromethyl ethers in which the monochloromethyl ether precursor thereof is reacted with a sterically hindered tertiary amine hydrofluoride salt.
摘要:
This invention pertains to methods for preparing 5-aroyl-1,2-dihydro-3H-pyrrolo-[1,2-a]pyrrole-1-carboxylic acids represented by formula (I): ##STR1## In a first embodiment, the method comprises the sequential steps of cyclizing, via a free radical ring closure reaction, and hydrolyzing a compound represented by formula (IV): ##STR2## wherein R.sub.1 is lower alkyl. In a second embodiment, the method comprises the sequential steps of hydrolyzing and decarboxylating a compound represented by formula (VIII): ##STR3##
摘要:
Compounds are disclosed of the formula ##STR1## optically active isomeric forms thereof, and/or pharmaceutically acceptable acid addition salts thereof, in which formula: R is defined in the disclosure.
摘要:
A method for preparing a fluorinated vinyl ether compound comprising reacting a fluorinated ether substrate having (i) a hydrogen atom on a carbon atom that is alpha to an etheric oxygen and (ii) a fluorine atom on a carbon atom that is beta to the etheric oxygen, with an organolithium base to provide a reaction product comprising a fluorinated vinyl ether compound.
摘要:
Compounds are disclosed of the formula ##STR1## wherein R.sup.1 is an unsubstituted or substituted herterocyclic ring system; R.sup.2 is an unsubstituted or substituted phenyl; R.sup.3 is a lower alkyl or lower alkoxy, and L is selected from a wide variety of groups.
摘要:
Compounds are disclosed of the formula ##STR1## where R.sup.2 is unsubstituted or substituted phenyl, R.sup.3 is lower alkyl, lower cycloalkyl or lower alkoxy lower alkyl, and L is selected from a wide variety of groups. This new class of compounds exhibit improved analgesic and anesthetic properties.
摘要:
The present invention is directed to an improved stereoselective tandem substitution and reduction of an imine precursor to the cis form of 3-substituted-4-(phenylanilo)piperidine compounds or their substituted derivatives.
摘要:
Compounds are disclosed of the formula ##STR1## where R.sup.2 is unsubstituted or substituted phenyl, R.sup.3 is lower alkyl, lower cycloalkyl or lower alkoxy lower alkyl, and L is selected from a wide variety of groups. This new class of compounds exhibit improved analgesic and anesthetic properties.
摘要:
Compounds are disclosed of the formula ##STR1## where R.sup.1 is a six numbered heterocyclic ring; R.sup.2 is a substituted or unsubstituted phenyl; R.sup.3 is lower alkyl, and L is selected from a variety of groups.
摘要:
Compounds are disclosed of the formula ##STR1## where R.sup.1 is an unsubstituted or substituted heterocyclic ring system; R.sup.2 is an unsubstituted or substituted phenyl; R.sup.3 is a lower alkyl or lower alkoxy, and L is selected from a wide variety of groups.