Cyclobutene, prepared by base-induced elimination from tosyloxycyclobutane 19 undergoes cycloaddition with ethyl propiolate in the presence of AlCl3 to provide ethyl bicyclo[2.2.0]hex-2-ene-2-carboxylate 20. This cycloadduct at room temperature and in the presence of AlCl3 undergoes forbidden ring opening into ethyl cyclohexa-1,3-diene-2-carboxylate 21. The cycloaddition of cyclobutene with dichloroketene
The present disclosure relates to antibody-drug conjugates (ADCs) wherein one or more active agents are conjugated to an anti-B7-H3 antibody through a linker. The linker may comprise a unit that covalently links active agents to the antibody. The disclosure further relates to monoclonal antibodies and antigen binding fragments, variants, multimeric versions, or bispecifics thereof that specifically bind B7-H3, as well as methods of making and using these anti-B7-H3 antibodies and antigen-binding fragments thereof in a variety of therapeutic, diagnostic and prophylactic indications
Polyether Brevetoxin Derivatives as a Treatment for Cystic Fibrosis, Mucociliary Dysfunction, and Pulmonary Diseases
申请人:Baden Daniel G.
公开号:US20090018184A1
公开(公告)日:2009-01-15
Disclosed are compounds that are derivatives of brevetoxin, or PbTx, pharmaceutical formulations comprising the compounds, and methods of regulating mucus transport in a cell, treating mucociliary dysfunction and diseases related to decreased mucus transport, wherein the compounds are of the Formula (I), and Formula (III):
wherein R, R
1
, R
2
, R
3
, A, n, and Y are as defined herein for each compound.