153653-00-0Relevant articles and documents
Transition-Metal-Catalyzed Transformation of Sulfonates via S-O Bond Cleavage: Synthesis of Alkyl Aryl Ether and Diaryl Ether
Chen, Xuemeng,Xiao, Xue,Sun, Haotian,Li, Yue,Cao, Haolin,Zhang, Xuemei,Yang, Shengyong,Lian, Zhong
supporting information, p. 8879 - 8883 (2019/11/14)
The catalytic conversion of sulfonates, a versatile class of pharmaceutical intermediates, is usually based on C-O bond cleavage. In this paper, however, we discover a rare transformation of sulfonates via S-O bond cleavage catalyzed by transition metal, through which alkyl sulfonates could undergo an intramolecular desulfitative C-O coupling to form aryl alkyl ethers in the presence of a nickel catalyst. Meanwhile, aryl sulfonates perform similarly to give diaryl ethers catalyzed by a palladium complex. This transformation could tolerate a wide range of functionalities. Controlled experiments reveal that the 2-pyridyl group is necessary to promote the reaction as designed. Crossover experiments proved that this transformation might proceed partly in an intermolecular pathway.
Heterobiaryl and heterobiaryl ether derived M5 positive allosteric modulators
Bridges, Thomas M.,Kennedy, J. Phillip,Hopkins, Corey R.,Conn, P. Jeffrey,Lindsley, Craig W.
scheme or table, p. 5617 - 5622 (2010/11/05)
This Letter describes a chemical lead optimization campaign directed at VU0238429, the first M5-preferring positive allosteric modulator (PAM), discovered through analog work around VU0119498, a pan Gq mAChR M1, M3, M5 PAM. An iterative parallel synthesis approach was employed to incorporate basic heterocycles to improve physiochemical properties.
A highly regioselective reaction of N-fluoropyridinium salts with stabilized sulfur, oxygen, and nitrogen nucleophiles: A convenient route to 2-substituted pyridines
Kiselyov,Strekowski
, p. 1361 - 1364 (2007/10/02)
2-Substituted pyridines are efficiently obtained by the reactions of N- fluoropyridinium tetrafluoroborate or triflate with anions derived from benzenethiols, phenols, azoles, cyanamide, and with azide anion. The results are consistent with a nucleophile addition at the position 2 of the N- fluoropyridinium cation as the major reaction pathway.