Facile Synthesis of 3-Nitro-2-substituted Thiophenes
摘要:
A new approach to 3-nitro-2-substituted thiophenes has been developed. Exposure of commercially available 1,4-dithane-2,5-diol to nitroalkenes in the presence of 20% triethylamine results in a tandem Michael intramolecular Henry reaction to form the corresponding tetrahydrothiophene. Subsequent microwave irradiation on acidic alumina in the presence of chloranil effects the solvent free dehydration and aromatization to form 3-nitro-2-substituted thiophenes cleanly and rapidly. A simple workup procedure removes the requirement for purification by chromatography in most cases.
Hypoxia activated prodrugs, such as, e.g., TH-281, TH-302, and TH-308, are useful for the treatment of various blood cancers, such as acute leukemias, chronic leukemias, MDS, MF, and multiple myeloma.
UNIT DOSE FORM FOR ORAL ADMINISTRATION
申请人:Jung Donald
公开号:US20140072624A1
公开(公告)日:2014-03-13
Formulations and unit dose forms of TH-302 and other hypoxia activated prodrugs suitable for oral administration are useful for treating cancer.
ADMINISTRATION OF HYPOXIA ACTIVATED PRODRUGS IN COMBINATION WITH CHK1 INHIBITORS FOR TREATING CANCER
申请人:THRESHOLD PHARMACEUTICALS, INC.
公开号:US20150005263A1
公开(公告)日:2015-01-01
Cancer can be treated by administration of TH-302 in combination with a Chk1 inhibitor.
HYPOXIA ACTIVATED PRODRUGS AND MTOR INHIBITORS FOR TREATING CANCER
申请人:THRESHOLD PHARMACEUTICALS, INC.
公开号:US20150005262A1
公开(公告)日:2015-01-01
Cancer is treated by administration of a hypoxia activated prodrug in combination with an mTOR inhibitor.