18717-73-2Relevant articles and documents
Contra-thermodynamic Hydrogen Atom Abstraction in the Selective C-H Functionalization of Trialkylamine N-CH3 Groups
Barham, Joshua P.,John, Matthew P.,Murphy, John A.
supporting information, p. 15482 - 15487 (2016/12/09)
We report a simple one-pot protocol that affords functionalization of N-CH3 groups in N-methyl-N,N-dialkylamines with high selectivity over N-CH2R or N-CHR2 groups. The radical cation DABCO+?, prepared in situ by oxidation of DABCO with a triarylaminium salt, effects highly selective and contra-thermodynamic C-H abstraction from N-CH3 groups. The intermediates that result react in situ with organometallic nucleophiles in a single pot, affording novel and highly selective homologation of N-CH3 groups. Chemoselectivity, scalability, and recyclability of reagents are demonstrated, and a mechanistic proposal is corroborated by computational and experimental results. The utility of the transformation is demonstrated in the late-stage site-selective functionalization of natural products and pharmaceuticals, allowing rapid derivatization for investigation of structure-activity relationships.
HETEROARYL DERIVATIVES FOR THE TREATMENT OF RESPIRATORY DISEASES
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Page/Page column 118; 119, (2015/06/18)
The invention relates to novel compounds of formula (I) which are both phosphodiesterase 4 (PDE4) enzyme inhibitors and muscarinic M3 receptor antagonists, methods of preparing such compounds, compositions containing them and therapeutic use thereof.
Azabicyclo[3.2.1]octan-3α-yl and azabicyclo[3.3.1]nonan-3α-yl carbamates as σ2-selective radiotracers
Yang,Whirrett,Wu,Wheeler,Childers,Mach
, p. S684-S686 (2007/10/03)
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