Efficient Organoruthenium Catalysts for α‐Alkylation of Ketones and Amide with Alcohols: Synthesis of Quinolines
<i>via</i>
Hydrogen Borrowing Strategy and their Mechanistic Studies
for C−C bond formation and exhibited excellent performance in the dehydrogenative coupling of ketones and amides. In the synthesis of C–C bonds, alcohols were utilized as the alkylating agent. A broad range of substrates, including sterically hindered ketones and alcohols, were well tolerated under the optimized conditions (TON up to 47000 and TOF up to 11750 h−1). This ruthenium (II) catalysts were
A Novel Approach to
<i>N</i>
‐Tf 2‐Aryl‐2,3‐Dihydroquinolin‐ 4(1
<i>H</i>
)‐ones via a Ligand‐Free Pd(II)‐Catalyzed Oxidative Aza‐Michael Cyclization
作者:Young Min Kim、Hyung‐Seok Yoo、Seung Hwan Son、Ga Yeong Kim、Hyu Jeong Jang、Dong Hwan Kim、Soo Dong Kim、Boyoung Y. Park、Nam‐Jung Kim
DOI:10.1002/ejoc.202001425
日期:2021.1.26
one‐pot ligand‐free palladium‐catalyzed α,β‐dehydrogenation of ketone and sequential aza‐Micahel addition was developed, which provides N‐Tf 2‐aryl‐2,3‐dihydroquinolin‐4(1H)‐ones in moderate to good yields. This catalytic reaction provides simple and mild reaction conditions, a wide scope of substrates to biologically interesting N‐heterocycles.
Iridium catalysed chemoselective alkylation of 2′-aminoacetophenone with primary benzyl type alcohols under microwave conditions
作者:Shailen Bhat、Visuvanathar Sridharan
DOI:10.1039/c2cc31055d
日期:——
2â²-Aminoacetophenone was chemoselectively alkylated with a range of substituted benzyl, heteroaryl alcohols to afford either the corresponding C- or N- alkylated products in good yield.
Synthesis of 3-Substituted 2,1-Benzisoxazoles by the Oxidative Cyclization of 2-Aminoacylbenzenes with Oxone
作者:Antonio Arcadi、Marco Chiarini、Luana Del Vecchio、Fabio Marinelli、Leucio Rossi
DOI:10.1055/s-0035-1561471
日期:——
An efficient approach to the synthesis of 2,1-benzisoxazoles through direct construction of the N–O bond by the chemoselective oxidation of 2-aminoacylbenzenes with Oxone is described. This alternative methodology is characterized by its simple and transition-metal-free conditions and good functional group compatibility utilizing Oxone as a green oxidant instead of hypervalent iodine compounds. Moreover
Design, Synthesis, and Biological Assessment of Biased Allosteric Modulation of the Urotensin II Receptor Using Achiral 1,3,4-Benzotriazepin-2-one Turn Mimics
作者:Antoine Douchez、Etienne Billard、Terence E. Hébert、David Chatenet、William D. Lubell
DOI:10.1021/acs.jmedchem.7b01525
日期:2017.12.14
amino ketones with an aza-glycine equivalent, chemoselective nitrogen functionalization, and ring closure. Several mimics exhibited selective modulatory effects on hUII- and URP-associated vasoconstriction in an ex vivo rat aortic ring bioassay. The C5p-hydroxyphenethenyl benzotriazepin-2-one 20g decreased hUII potency and efficacy without changing URP induced vasoconstriction. Its saturated phenethyl