N-Benzylisatin Sulfonamide Analogues as Potent Caspase-3 Inhibitors: Synthesis, in Vitro Activity, and Molecular Modeling Studies
摘要:
A number of isatin sulfonamide analogues were prepared and their potencies for inhibiting caspase-1, -3, -6, -7, and -8 were evaluated in vitro. Several compounds displaying a nanomolar potency for inhibiting the executioner caspases, caspase-3 and caspase-7, were identified. These compounds were also observed to have a low potency for inhibiting the initiator caspases, caspase-1 and caspase-8, and caspase-6. Molecular modeling studies provided further insight into the interaction of this class of compounds with activated caspase-3. The results of the current study revealed a number of non-peptide-based caspase inhibitors that may be useful in assessing the role of inhibiting the executioner caspases in minimizing tissue damage in disease conditions characterized by unregulated apoptosis.
N-Benzylisatin Sulfonamide Analogues as Potent Caspase-3 Inhibitors: Synthesis, in Vitro Activity, and Molecular Modeling Studies
摘要:
A number of isatin sulfonamide analogues were prepared and their potencies for inhibiting caspase-1, -3, -6, -7, and -8 were evaluated in vitro. Several compounds displaying a nanomolar potency for inhibiting the executioner caspases, caspase-3 and caspase-7, were identified. These compounds were also observed to have a low potency for inhibiting the initiator caspases, caspase-1 and caspase-8, and caspase-6. Molecular modeling studies provided further insight into the interaction of this class of compounds with activated caspase-3. The results of the current study revealed a number of non-peptide-based caspase inhibitors that may be useful in assessing the role of inhibiting the executioner caspases in minimizing tissue damage in disease conditions characterized by unregulated apoptosis.
Simple Chiral PyrrolidineâPyridine-Based Catalysts for Highly Enantioselective Michael Addition to Nitro Olefins
作者:Da-Zhen Xu、Sen Shi、Yongmei Wang
DOI:10.1002/ejoc.200900716
日期:2009.10
of chiral pyrrolidine–pyridine-based organocatalysts, available from commercially available starting materials, have been synthesized and shown to be very effective catalysts for the asymmetric Michaeladdition reactions of cyclic/acyclic/aromatic ketones and an aldehyde with nitro olefins, giving excellent yields (up to 99 %), diastereoselectivities (syn/anti = 99:1), and enantioselectivities (up
There is provided a novel compound that inhibits interaction between murine double minute 2 (Mdm2) protein and p53 protein and exhibits anti-tumor activity. The present invention provides an imidazothiazole derivative represented by the following formula (1) having various substituents that inhibits interaction between Mdm2 protein and p53 protein and exhibits anti-tumor activity:
wherein R
1
, R
2
, R
3
, R
4
, and R
5
in the formula (1) each has the same meaning as defined in the specification.
There is provided a novel compound that inhibits interaction between murine double minute 2 (Mdm2) protein and p53 protein and exhibits anti-tumor activity. The present invention provides an imidazothiazole derivative represented by the following formula (1) having various substituents that inhibits interaction between Mdm2 protein and p53 protein and exhibits anti-tumor activity:
wherein R1, R2, R3, R4, and R5 in the formula (1) each has the same meaning as defined in the specification.
Pyrrolidine–pyridine base catalysts for the enantioselective Michael addition of ketones to chalcones
作者:Da-Zhen Xu、Sen Shi、Yingjun Liu、Yongmei Wang
DOI:10.1016/j.tet.2009.09.001
日期:2009.11
A series of pyrrolidine-pyridine base organocatalysts have been developed and 3a found to be a highly effective catalyst for the asymmetric Michael addition reactions of ketones to chalcones. The reaction generated the corresponding products 1, 5-diketones in excellent diastereoselectivities (up to >99:1 dr) and enantioselectivities (up to 100% ee). (c) 2009 Elsevier Ltd. All rights reserved.