Synthesis of 5-Substituted 1-Hydroxy-1,2,3-triazoles through Directed Lithiation of 1-(Benzyloxy)-1,2,3-triazole
摘要:
1-(Benzyloxy)-1,2,3-triazole, prepared by selective benzylation of 1-hydroxy-1,2,3-triazole or by oxidative cyclization of 2-hydrazonoglyoxal O-benzyloxime, was metalated exclusively at the 5-position upon treatment with n-butyllithium. The anion formed reacted with a series of electrophiles. In this way carbon, halogen, sulfur, silicon, and tin substituents could be introduced at the 5-position. Subsequent removal of the benzyl group by palladium-catalyzed hydrogenolysis or by treatment with hydrochloric acid afforded the corresponding 5-substituted 1-hydroxy-1,2,3-triazoles.
Preparation of 1-Hydroxypyrazoles and 1-Hydroxy-1,2,3-triazoles by Dealkylation of Pyrazole and Triazole N-Oxides.
摘要:
1-Hydroxypyrazoles were obtained from 2-benzylpyrazole I-oxides by debenzylation with iodotrimethylsilane. 1-Hydroxy-1,2,3-triazoles were achieved from 2-benzyltriazole 1-oxides by debenzylation effected with cone. hydrobromic acid or from 2- or 3-p-methoxybenzyltriazole 1-oxides by de-p-methoxybenzylation accomplished by treatment with cone. sulfuric acid. 1-Methoxy-1,2,3-triazole was obtained by de-p-methoxybenzylation of 1-methoxy-3-p-methoxybenzyl-1,2,3-triazolium tetrafluoroborate accomplished by treatment with cone. sulfuric acid. 1-Hydroxypyrazole was selectively N-benzylated in absence of base to give 2-benzylpyrazole 1-oxide which, upon selective substitution at the 3-position and subsequent debenzylation, produced 3-substituted 1-hydroxypyrazole.
Compounds and uses thereof for decreasing activity of hormone-sensitive lipase
申请人:——
公开号:US20030166644A1
公开(公告)日:2003-09-04
Use of compounds to inhibit hormone-sensitive lipase, pharmaceutical compositions comprising the compounds, methods of treatment employing these compounds and compositions, and novel compounds. The present compounds are inhibitors of hormone-sensitive lipase and may be useful in the treatment and/or prevention of medical disorders where a decreased activity of hormone-sensitive lipase is desirable.
Use of compounds for decreasing activity of hormone-sensitive
申请人:——
公开号:US20030166690A1
公开(公告)日:2003-09-04
Use of compounds to inhibit hormone-sensitive lipase, pharmaceutical compositions comprising the compounds, methods of treatment employing these compounds and compositions, and novel compounds. The present compounds are inhibitors of hormone-sensitive lipase and may be useful in the treatment and/or prevention of medical disorders where a decreased activity of hormone-sensitive lipase is desirable.
Derivatives of 1-hydroxy-1,2,4-triazole and fungicides and growth
申请人:BASF Aktiengesellschaft
公开号:US05081142A1
公开(公告)日:1992-01-14
Compounds of the formula I ##STR1## where Ar is unsubstituted or substituted phenyl, pyridyl, thienyl or napthyl, R.sup.1 is hydrogen or CN, R.sup.2 is unsubstituted or substituted aryl, hetaryl, alkyl or cycloalkyl, or is unsubstituted or substituted alkenyl or alkynyl, x is CH.sub.2, O or S and n is 0 or 1, their plant-tolerated acid addition salts and metal complexes, and fungicides and growth regulators containing these compounds.
BENZO FIVE-MEMBERED NITROGEN HETEROCYCLIC PIPERIDINE OR PIPERAZINE DERIVATIVES AND PREPARATION METHODS AND PHARMACEUTICAL COMPOSITIONS THEREOF
申请人:Zhou Yan
公开号:US20160009703A1
公开(公告)日:2016-01-14
The present invention relates to the compounds of formula (I) or pharmaceutically acceptable salts thereof: wherein R
1
, R
2
, X, Y, A and B are defined in the description. Also disclosed in the present invention are the methods for preparing the compounds of formula (I) or pharmaceutically acceptable salts thereof, and pharmaceutical compositions comprising the compounds of formula (I) or pharmaceutically acceptable salts thereof.
Use of compounds for decreasing activity of hormone-sensitive lipase
申请人:Nero Nordisk A/S
公开号:US07067517B2
公开(公告)日:2006-06-27
Use of compounds to inhibit hormone-sensitive lipase, pharmaceutical compositions comprising the compounds, methods of treatment employing these compounds and compositions, and novel compounds. The present compounds are inhibitors of hormone-sensitive lipase and may be useful in the treatment and/or prevention of medical disorders where a decreased activity of hormone-sensitive lipase is desirable.