摘要:
5,6-Dihydro-4-(R-amino)-4H-thieno[2,3-b]-thiopyran-2-sulfonamide-7,7-dioxide is a potent carbonic anhydrase inhibitor useful in the treatment of ocular hypertension and glaucoma. The S-(+)-enantiomer of that compound, the more active enantiomer, is prepared by a process involving an intermediate step of an enantioselective reduction of a carbonyl group employing an oxazaborolidine chiral catalyst.
摘要:
The present invention is directed to a compound represented by the structural formula: ##STR1## wherein Z-- represents a negatively charged counterion.
摘要:
Compounds classified as 5,6-dihydro-4-alkylamino-4H-thieno (or furo) [2,3-b]thiopyran-2-sulfonamide-7,7-dioxide are carbonic anhydrase inhibitors useful in the treatment of ocular hypertension, and most of the carbonic anhydrase inhibitory activity resides in only one of the enantiomers. The undesired enantiomer is utilized by racemization by thermolysis of an N-acyl derivative in a basic environment followed by removal of the acyl group. The racemate may then be resolved into the enantiomers.
摘要:
(S)-Alkyl 3-(thien-2-ylthio)butyrate and analogs are intermediates in the synthesis of the chiral (S,S)-5,6-dihydro-4-ethylamino-6-methyl-4H-thieno[2,3-b]thiopyran-2-sulfonamide-7,7-dioxide and analogs thereof, topically effective carbonic anhydrase inhibitors useful in the treatment of ocular hypertension and glaucoma.
摘要:
The present invention is directed to a process of making 2-aryl carbapenems of formula 1 from a compound of formula A. ##STR1## wherein compound A is reacted with a silyl protected boronic acid compound of the formula B: ##STR2## and wherein Ar is selected from the group consisting of: ##STR3##
摘要:
An efficient method for the preparation of a compound of (-)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one, also known as DMP-266, a reverse transcriptase inhibitor is achieved using a cyclization reaction of the amino alcohol intermediate with an alkyl or aryl chloroformate and a base.
摘要:
An asymmetric synthesis of (S)-(-)-6-chloro-4-cyclopropyl-3,4-dihydro-4-[(2-pyridyl)ethynyl]-2(1H)-quinazolinone comprises the chiral addition of 2-pyridylacetylide to N.sup.1 -protected 6-chloro-4-cyclopropyl-2-quinazolinone followed by removal of the protecting group.
摘要:
A new heterocycle, 5,11-diazatetracyclo-[6.2.2.0.sup.2,7.0.sup.4,9 ]dodecane, is prepared by heating an endo-diazatricyclo[6.2.2.0.sup.2,7 ]dodec-11-ene substituted in the 7 and 11 positions with electron withdrawing groups. 2,9-Bis-phenylacetyl derivatives of the new heterocycle and closely related derivatives are potent analgesic agents.
摘要:
A new heterocycle, 5,11-diazatetracyclo[6.2.2.0.sup.2,7.0.sup.4.9 ]dodecane, is prepared by heating an endo-diazatricyclo[6.2.2.0.sup.2,7 ]dodec-11-ene substituted in the 7 and 11 positions with electron withdrawing groups. 2,9-Bis-phenylacetyl derivatives of the new heterocycle and closely related derivatives are potent analgesic agents.
摘要:
The racemates of 2-deutero-3-fluoro-alanine and its salts are prepared by reductive amination of 3-fluoro-pyruvic acid, its hydrate or salts thereof, via the intermediate 2-imino-3-fluoro propionic acid salt, using alkali metal borodeuterides as reducing agents. The racemates thus obtained are valuable in the production of the corresponding 2-deutero-3-fluoro-D-alanine, and its pharmacologically acceptable salts, and derivatives thereof, which are potent antibacterial agents.