Additive-Free Palladium-Catalyzed Decarboxylative Cross-Coupling of Aryl Chlorides
作者:Ryan A. Daley、En-Chih Liu、Joseph J. Topczewski
DOI:10.1021/acs.orglett.9b01620
日期:2019.6.21
The cross-coupling of sodium (hetero)aryl carboxylates with (hetero)arylchlorides proceeds with 1 mol % palladium catalyst and does not require inorganic base, silver salts, or copper salts. This coupling uses two low energy partners, and the only stoichiometric byproducts are carbon dioxide and sodium chloride. The substrate scope includes less activated arylchlorides and carboxylates (>25 examples)
Gold Catalyzed Decarboxylative Cross-Coupling of Iodoarenes
作者:Ryan A. Daley、Aaron S. Morrenzin、Sharon R. Neufeldt、Joseph J. Topczewski
DOI:10.1021/jacs.0c06244
日期:2020.7.29
This report details a decarboxylativecross-coupling of (hetero)arylcarboxylates with iodoarenes in the presence of a gold cata-lyst (>25 examples, up to 96% yield). This reaction is site specific, which overcomes prior limitations associated with gold cat-alyzed oxidative coupling reactions. The reactivity of the (hetero)arylcarboxylate correlates qualitatively to the field effect pa-rameter (Fortho)
The invention provides a compound which is an amide of the formula (1), or a salt, solvate, N-oxide or tautomer thereof; wherein: a is 0 or 1; b is 0 or 1: provided that the sum of a and b is 0 or 1; T is O or NH Ar1 is a monocyclic or bicyclic 5- to 10-membered aryl or heteroaryl group containing up to 4 heteroatoms selected from O, N and S, and being optionally substituted by one or more substituents R1; Ar2 Js a monocyclic or bicyclic 5- to 10-membered aryl or heteroaryl group containing up to 4 heteroatoms selected from O, N and S and being optionally substituted by one or more substituents R2; and R1 and R2 are as defined in the claims. The compounds are inhibitors of kinases and in particular FLT3, FLT4 and Aurora kinases.
The invention provides a compound which is an amide of the formula (1), or a salt, solvate, N-oxide or tautomer thereof; wherein: a is 0 or 1; b is 0 or 1: provided that the sum of a and b is 0 or 1; T is O or NH Ar
1
is a monocyclic or bicyclic 5- to 10-membered aryl or heteroaryl group containing up to 4 heteroatoms selected from O, N and S, and being optionally substituted en by one or more substituents R
1
; Ar
2
Js a monocyclic or bicyclic 5- to 10-membered aryl or heteroaryl group containing up to 4 heteroatoms selected from O, N and S and being optionally substituted by one or more substituents R
2
; and R
1
and R
2
are as defined in the claims. The compounds are inhibitors of kinases and in particular FLT3, FLT4 and Aurora kinases.