59830-60-3Relevant articles and documents
The Chemical Development of LB71350
Lee, Kyu Woong,So, Byungran,Cho, Sung Wook,Shin, Hyunik,Hwang, Sang Yeul,Kim, Chung Ryeol,Nam, Do Hyun,Chang, Jay Hyok,Choi, Sang Chul,Choi, Bo Seung,Choi, Hyeong-Wook,Lee, Ki Kon
, p. 839 - 845 (2003)
An efficient synthesis of the HIV-1 protease inhibitor LB71350 (1) is described. High diastereoselective epoxidation of the cis-allylic carbamate fragment of (5S)-[N-(benzyloxycarbonyl)-amino]-N-[2-methyl-(1R)-[(phenyl) carbonyl]-propyl]-6-phenylhex-(Z)-e
Discovery of Peptidomimetic Antibody-Drug Conjugate Linkers with Enhanced Protease Specificity
Wei, Binqing,Gunzner-Toste, Janet,Yao, Hui,Wang, Tao,Wang, Jing,Xu, Zijin,Chen, Jinhua,Wai, John,Nonomiya, Jim,Tsai, Siao Ping,Chuh, Josefa,Kozak, Katherine R.,Liu, Yichin,Yu, Shang-Fan,Lau, Jeff,Li, Guangmin,Phillips, Gail D.,Leipold, Doug,Kamath, Amrita,Su, Dian,Xu, Keyang,Eigenbrot, Charles,Steinbacher, Stefan,Ohri, Rachana,Raab, Helga,Staben, Leanna R.,Zhao, Guiling,Flygare, John A.,Pillow, Thomas H.,Verma, Vishal,Masterson, Luke A.,Howard, Philip W.,Safina, Brian
supporting information, p. 989 - 1000 (2018/01/01)
Antibody-drug conjugates (ADCs) have become an important therapeutic modality for oncology, with three approved by the FDA and over 60 others in clinical trials. Despite the progress, improvements in ADC therapeutic index are desired. Peptide-based ADC linkers that are cleaved by lysosomal proteases have shown sufficient stability in serum and effective payload-release in targeted cells. If the linker can be preferentially hydrolyzed by tumor-specific proteases, safety margin may improve. However, the use of peptide-based linkers limits our ability to modulate protease specificity. Here we report the structure-guided discovery of novel, nonpeptidic ADC linkers. We show that a cyclobutane-1,1-dicarboxamide-containing linker is hydrolyzed predominantly by cathepsin B while the valine-citrulline dipeptide linker is not. ADCs bearing the nonpeptidic linker are as efficacious and stable in vivo as those with the dipeptide linker. Our results strongly support the application of the peptidomimetic linker and present new opportunities for improving the selectivity of ADCs.
Burgess Reagent Facilitated Alcohol Oxidations in DMSO
Sultane, Prakash R.,Bielawski, Christopher W.
, p. 1046 - 1052 (2018/06/18)
The Burgess reagent ([methoxycarbonylsulfamoyl]triethylammonium hydroxide) has historically found utility as a dehydrating agent. Herein we show that, in the presence of dimethyl sulfoxide, the Burgess reagent efficiently and rapidly facilitates the oxidation of a broad range of primary and secondary alcohols to their corresponding aldehydes and ketones in excellent yields and under mild conditions, and can be combined with other transformations (e.g., Wittig olefinations). A mechanism similar to those described for the Pfitzner-Moffatt and Swern oxidations is proposed.