environment nearby the Pd metal center. Three rings of multilayer 3D products can be readily changed by varying aromatic ring-anchored starting materials. The resulting multilayer products displayed strong luminescence under UV irradiation and strong aggregation-induced emission (AIE). In the future, this work would benefit not only the field of asymmetric synthesis but also materials science, in particular
The first enantioselective Michael addition of alpha-cyanoketones to alpha,beta-unsaturated trifluoromethyl ketones using a novel piperazine-thiourea catalyst was described. The resulting alpha-trifluoromethyldihydropyrans were obtained in high yields and with up to 95% ee within a short reaction time. A useful transformation of the chiral adduct was also illustrated.
The first primary aminocatalytic direct cross-aldol reaction of acetaldehyde is presented. Among the various vicinal diamines screened, the L-tert-leucine derivative 1c in conjunction with (H4SiW12O40)0.25 was identified as the optimal catalyst; good catalytic activity (up to 99 % yield in 4 h), and high enantioselectivities (up to 92 % ee) were achieved for a range of donors, including aromatic aldehydes
Aminocarbonyloxymethyl esterprodrugs are known to undergo rearrangement in aqueous solutions to form the corresponding N‐acylamine side product via an O → N intramolecular acyl transfer from the carbamate conjugate base. Novel aminocarbonyloxymethyl esters of diclofenac and flufenamic acid containing amino acid amide carriers were synthesized and evaluated as potential prodrugs displaying less ability
Design, Synthesis, and Cytotoxic Evaluation of Novel Tubulysin Analogues as ADC Payloads
作者:Carolyn A. Leverett、Sai Chetan K. Sukuru、Beth C. Vetelino、Sylvia Musto、Kevin Parris、Jayvardhan Pandit、Frank Loganzo、Alison H. Varghese、Guoyun Bai、Bin Liu、Dingguo Liu、Sarah Hudson、Venkata Ramana Doppalapudi、Joseph Stock、Christopher J. O’Donnell、Chakrapani Subramanyam
DOI:10.1021/acsmedchemlett.6b00274
日期:2016.11.10
antibody–drug conjugates (ADCs). A structure-based and parallel medicinal chemistry approach was applied to the synthesis of novel tubulysin analogues. These efforts led to the discovery of a number of novel and potent cytotoxic tubulysin analogues, providing a framework for our simultaneous report, which highlights the discovery of tubulysin-based ADCs, including use of site-specific conjugation to address