49759-74-2Relevant articles and documents
Amino Acid Functionalized Organotin Trichlorides and Their Tin Sulfide Clusters
Engel, Annikka,Dehnen, Stefanie
, (2019/08/02)
We present a new synthesis of functionalized tin sulfide clusters via organotin trichlorides with boc-protected amino acids (RAAcSnCl3). In this work we used non-polar (alanine, valine, leucine, phenylalanine and methionine), polar/neutral (serine and tyrosine) and basic (histidine) amino acids. We obtained single crystals from a Boc-protected valine derivative of the originally used organotin trichloride R1SnCl3 [R1 = CMe2CH2C(O)Me] and determined its structure by means of X-ray diffraction. A subsequent reaction with sulfide sources led to a variety of respective cluster structures. By using either (Me3Si)2S or Na2S, the reaction product turns out to be the defect-heterocubane cluster [(RAAcSn)3S4Cl] or the “doppeldecker”-type cluster [(RAAcSn)4S6], respectively, according to 119Sn NMR spectroscopy.
Design, synthesis and biological evaluation of a library of thiocarbazates and their activity as cysteine protease inhibitors
Liu, Zhuqing,Myers, Michael C.,Shah, Parag P.,Beavers, Mary Pat,Benedetti, Phillip A.,Diamond, Scott L.,Smith, Amos B.,Huryn, Donna M.
experimental part, p. 337 - 351 (2010/09/04)
Recently, we identified a novel class of potent cathepsin L inhibitors, characterized by a thiocarbazate warhead. Given the potential of these compounds to inhibit other cysteine proteases, we designed and synthesized a library of thiocarbazates containing diversity elements at three positions. Biological characterization of this library for activity against a panel of proteases indicated a significant preference for members of the papain family of cysteine proteases over serine, metallo-, and certain classes of cysteine proteases, such as caspases. Several potent inhibitors of cathepsin L and S were identified. The SAR data were employed in docking studies in an effort to understand the structural elements required for cathepsin S inhibition. This study provides the basis for the design of highly potent and selective inhibitors of the papain family of cysteine proteases.