The present invention relates to modulators of muscarinic receptors. The present invention also provides compositions comprising such modulators, and methods therewith for treating muscarinic receptor mediated diseases.
Pd(II)-Catalyzed Chemoselective Acetoxylation of C(sp<sup>2</sup>)–H and C(sp<sup>3</sup>)–H Bonds in Tertiary Amides
作者:Muniyappa Vijaykumar、Benudhar Punji
DOI:10.1021/acs.joc.1c00629
日期:2021.6.18
Palladium-catalyzed chemoselective C(sp2)–H and C(sp3)–H acetoxylation of synthetically useful tertiary amides is reported under relatively mild reaction conditions. This protocol proceeds through the assistance of a weakly coordinated directing group (C═O) and requires low catalyst (1.0 mol %) loading. Diverse functionalities, such as C(sp2)–Cl, C(sp3)–Cl, −CF3, −COOEt, and −NO2 groups, including
Palladium-Catalyzed [3 + 2] Cycloaddition via Twofold 1,3-C(sp<sup>3</sup>)–H Activation
作者:Hojoon Park、Jin-Quan Yu
DOI:10.1021/jacs.0c08290
日期:2020.9.30
report a palladium-catalyzed [3+2] reaction that utilizes two-fold C(sp3)-H activation to generate the three-carbon unit for formal cycloaddition. The initial -C(sp3)-H activation of aliphatic amide/maleimide insertion triggers a re-layed, second C(sp3)-H activation to complete a formal [3+2] cycloaddition. The key to success was the use of weakly coor-dinating amide as the directing group, as undesired
N,N-diisopropylcarboxylic acid amide complexes of thorium(IV) and uranium(IV) N-thiocyanates; the crystal structure of tetraisothiocyanato tetrakis(N,N-diisopropylacetamide-O)uranium(IV)
作者:Abdul Ghany M. Al-Daher、Kenneth W. Bagnall、Carla Bisi Castellani、Franco Benetollo、Gabriella Bombieri
DOI:10.1016/s0020-1693(00)84895-1
日期:1984.11
squares to R 0.029 for 1135 independent reflections. The crystal is tetragonal, space group P 4 21c, with Z = 2, a = 15.663(4) and c = 10.512(3) A. The coordination geometry about the 8-coordinate uranium atom is dodecahedral with the N atoms of the NCS groups occupying the dodecahedral A sites and the ‘dipa’ O atoms the B sites. The bonding distances of UO and UN are 2.363(8), and 2.444(11) A respectively
Stereodynamics of inversion and rotation in trialkylamines. N,N-Diisopropyl primary alkylamines studied by dynamic NMR spectroscopy and molecular mechanics calculations
作者:J. Edgar Anderson、Daniele Casarini、Lodovico Lunazzi
DOI:10.1039/p29900001791
日期:——
conformational processes can be distinguished and studied in N,N-diisopropylneopentylamine. A high-barrier inversion/rotation process involves eclipsing of t-butyl and isopropyl groups, while a rotation process with a lower barrier involves lesser eclipsing interactions. Molecularmechanicscalculations help illustrate the ground state conformations involved. Barriers are smaller when the neopentyl group is replaced