1-Boraadamantane Blows Its Top, Sometimes. The Mono- and Polyhomologation of 1-Boraadamantane
作者:Carl E. Wagner、Kenneth J. Shea
DOI:10.1021/ol0159726
日期:2001.10.1
1-Boraadamantane-THF (3) reacts with I equiv of dimethylsulfoxonium methylide (4) to afford a monohomologated product. The polyhomologation of 1-boraadamantane-THF by ylide 4 followed by oxidative cleavage generates star polymethylene polymers incorporating a cyclohexane core. However, only one-third of the initiators lead to product formation, resulting in an observed degree of polymerization three times higher than expected. The polyhomologation of 3 was found to contain branch points after the fourth and fifth methylene insertions. At the branch points, the propagating species either terminate in tricyclic trialkylborane cages with collapsed, pyramidal inverted boron centers that are unreactive toward ylide or they continue in uninterrupted polymerization and eventually result in the formation of giant "tube-like" structures such as 5.
TREATMENT OF CANCER USING TLR9 AGONIST WITH CHECKPOINT INHIBITORS
申请人:IDERA PHARMACEUTICALS, INC.
公开号:US20200101102A1
公开(公告)日:2020-04-02
The invention provides methods of inducing an immune response to cancer comprising co-administering to a cancer patient one or more TLR9 agonists and one or more checkpoint inhibitors. Preferably, the one or more TLR9 agonists are administered to the patient via intratumoral (i.t.) administration.