Chemoselective Radical Cleavage of Cbz-Protected Nitrogen Compounds
摘要:
[GRAPHICS]Tributylstannyl radicals promote the deprotection of N-Cbz derivatives of amides and nitrogen-containing heteroaromatic rings. These radical conditions do not affect N-Cbz derivatives of basic amines.
Disclosed are compounds and pharmaceutically acceptable salts of formula (I):
which are useful in the treatment of metabolic disorders related to insulin resistance, leptin resistance, or hyperglycemia. Compounds of the invention include inhibitors of Protein tyrosine phosphatases, in particular Protein tyrosine phosphatase-1B (PTP-1B), that are useful in the treatment of diabetes and other PTP mediated diseases, such as cancer, neurodegenerative diseases and the like. Also disclosed are pharmaceutical compositions comprising compounds of the invention and methods of treating the aforementioned conditions using such compounds.
a P(III)/P(V)═O cycle. This catalytic reaction provides a facile and efficient route for the direct construction of C1-deuterated indol-3-carboxaldehyde under mild conditions with stoichiometric DMF-d7 as the deuteriumsource. The products feature a remarkably higher deuteration level (>99%) than previously reported ones and are not contaminated by the likely unselective deuteration at other sites