Monosubstituted γ-lactam and conformationally constrained 1,3-diaminopropan-2-ol transition-state isostere inhibitors of β-secretase (BACE)
摘要:
The synthesis, evaluation, and structure-activity relationships of a class of gamma-lactam 1,3-diaminopropan-2-ol transition-state isostere inhibitors of BACE are discussed. Two strategies for optimizing lead compound 1a are presented. Reducing the overall size of the inhibitors resulted in the identification of gamma-lactam 1i, whereas the introduction of conformational constraint on the prime-side of the inhibitor generated compounds such as the 3-hydroxypyrrolidine inhibitor 28n. The full in vivo profile of 1i in rats and 28n in Tg 2576 mice is presented. (C) 2011 Elsevier Ltd. All rights reserved.
There is provided a series of novel substituted gamma-lactams of Formula (I)
or a stereoisomer; or a pharmaceutically acceptable salt thereof, wherein R
1
, R
2
, R
4
, R
5
and R
6
as defined herein, their pharmaceutical compositions and methods of use. These novel compounds inhibit the processing of amyloid precursor protein (APP) by β-secretase and, more specifically, inhibit the production of Aβ-peptide. The present disclosure is directed to compounds useful in the treatment of neurological disorders related to β-amyloid production, such as Alzheimer's disease and other conditions affected by anti-amyloid activity.
Conformational Preference in Bis(porphyrin) Tweezer Complexes: A Versatile Chirality Sensor for α-Chiral Carboxylic Acids
作者:Marina Tanasova、Babak Borhan
DOI:10.1002/ejoc.201200147
日期:2012.6
determinant of binding conformation. Experimental results indicate that a balance between linker flexibility and rigidity could yield an optimum porphyrintweezer that stabilizes a common conformation for all bound chiral guests. This leads to a more simplified approach to absolute stereochemical determination of asymmetry for small organic molecules. This was demonstrated by the use of a C3-linked zincated
There is provided a series of novel substituted gamma-lactams of Formula (I)
or a stereoisomer; or a pharmaceutically acceptable salt thereof, wherein R1, R2, R4, R5 and R6 as defined herein, their pharmaceutical compositions and methods of use. These novel compounds inhibit the processing of amyloid precursor protein (APP) by β-secretase and, more specifically, inhibit the production of Aβ-peptide. The present disclosure is directed to compounds useful in the treatment of neurological disorders related to β-amyloid production, such as Alzheimer's disease and other conditions affected by anti-amyloid activity.