GEM-DISUBSTITUTED PYRROLIDINES, PIPERAZINES, AND DIAZEPANES, AND COMPOSITIONS AND METHODS OF MAKING THE SAME
申请人:California Institute of Technology
公开号:US20200199114A1
公开(公告)日:2020-06-25
Described here are transition metal-catalyzed enantioselective arylation and vinylation reactions of α-substituted lactams, such as γ-lactams. The use of various electrophiles and ligands are described, and result in the construction of α-quaternary centers in good yields (up to 91% yield) and high enantioselectivities (up to 97% ee).
A compound useful as a building block for the manufacture of various compounds is represented by Formula A or D.
In Formula A and D, z is 0 or 1; Q is a heteroatom; R1 through R11 and Ra through Rf are each independently hydrogen, a substituted or unsubstituted hydrocarbyl group, a substituted or unsubstituted heteroatom containing hydrocarbyl group, or a functional group; d, e and f are each independently 0 or greater; each of A, B and D is independently a carbon atom or a heteroatom; and two or more of R1 though R11, Ra through Rf and Y optionally combine to form a ring. In some embodiments, R8 and R9 combine to form a carbonyl group. In some embodiments, R2 and Y combine to form a ring with the Q atom. In some embodiments, the ring includes at least one double bond.
作者:Alexander W. Sun、Stephan N. Hess、Brian M. Stoltz
DOI:10.1039/c8sc03967d
日期:——
An enantioselectivesynthesis of diverse N4-Boc-protected α,α-disubstituted piperazin-2-ones using the palladium-catalyzed decarboxylative allylic alkylation reaction has been achieved. Using a chiral Pd-catalyst derivedfrom an electron deficient PHOX ligand, chiral piperazinones are synthesized in high yields and enantioselectivity. The chiral piperazinone products can be deprotected and reduced
The invention provides heterocyclic compounds with quaternary centers and methods of preparing compounds. Methods include the method for the preparation of a compound of Formula (II):
comprising treating a compound of Formula (I):
with a transition metal catalyst and under alkylation conditions as valence and stability permit.