Two-step three-component process for one-pot synthesis of 8-alkylmercaptocaffeine derivatives
作者:M. N. Soltani Rad、S. Maghsoudi
DOI:10.1039/c6ra17814f
日期:——
A highly efficient, odourless and two-step three-component process for one-pot synthesis of some 8-alkylmercaptocaffeine derivatives has been described. The catalyst-free three-component reaction of alkyl bromides, thiourea, and 8-bromocaffeine gave 8-alkylmercaptocaffeine products in excellent to quantitative yields. In addition, the impact of parameters on sample reaction is discussed.
[EN] APOPTOSIS INHIBITORS<br/>[FR] INHIBITEURS DE L'APOPTOSE
申请人:NAT INSTITUTE OF BIOLOGICAL SCIENCES BEIJING
公开号:WO2018014802A1
公开(公告)日:2018-01-25
The invention provides compounds that are inhibitors or covalent modifiers of succinate dehydrogenase subunit B (SDHB) and/or inhibitors of apoptosis, and pharmaceutically acceptable salts, hydrides and stereoisomers thereof. The compounds are employed in pharmaceutical compositions, and methods of making and use, including treating a person in need thereof with an effective amount of the compound or composition.
A compound selected from those of formula (I):
1
wherein:
Ra represents linear or branched (C
1
-C
6
)alkylene,
X represents a group selected from W
1
, —C(W
1
)—W
2
—, —W
2
—C(W
1
)—, —W
2
—C(W
1
)W
2
—, —W
2
-Ra- and —CH(OR
1
)— wherein W
1
, W
2
and R
1
are as defined in the description, when Y represents aryl or heteroaryl, or
X represents a group selected from single bond, —C(W
1
)—, —W
2
—C(W
1
)—, —W
2
-Ra and —CH(OR
1
)— wherein W
1
, W
2
, Ra and R
1
are as defined hereinbefore, when Y represents a fused bicyclic group, of formula:
2
wherein:
A represents nitrogen-containing heterocycle having from 4 to 7 ring members that is unsaturated or partially saturated and optionally contains a second hetero atom,
B represents phenyl ring optionally substituted by one or more groups as defined in the description,
its isomers, and addition salts thereof with a pharmaceutically acceptable acid or base, medicinal products containing the same are useful in the treatment of cognitive deficiencies.
AbstractN-alkylation of heterocycles with 1,3-dibromopropane using Schiff base Co(II), Ni(II), Cu(II) and Zn(II) transition metal complexes as a catalyst was studied in 1:1 and 2:1 coupling ratios under mild conditions. It was observed that all the complexes worked as efficient catalyst with product yield 78–92% for coupling ratio 1:1 and product yield 63–78% for coupling ratio 2:1. N-alkylation of
Pd-Catalyzed regioselective intramolecular dehydrogenative C-5 cross coupling in an<i>N</i>-substituted pyrrole-azole system
作者:Krishna N. Tripathi、Devalina Ray、Ravi P. Singh
DOI:10.1039/c7ob02676e
日期:——
Functionalized polycyclic pyrrole-azole structures possessing fused six membered and seven membered rings were directly synthesized via ligand-enabled, Pd-catalyzed, site selective, intramolecular cross couplings of N-substituted pyrrole-azoles. C5-H activation in the presence of a reactive C2-H remains a challenge that needs to be addressed and this was targeted to be resolved through the present