5597-04-6Relevant articles and documents
Synthesis of 2-(Cyanomethyl)benzoic Esters via Carbon-Carbon Bond Cleavage of Indanones
Meng, Xiangtai,Chen, Dengfeng,Liu, Rui,Jiang, Ping,Huang, Shenlin
, p. 10852 - 10860 (2021/08/20)
A novel synthesis of 2-(cyanomethyl)benzoic esters from indanone derivatives has been established. This reaction proceeds via a deprotonation of alcohols with a chemical base, followed by a nucleophilic addition to indanones and Beckmann fragmentation. In addition, this reaction could also work under electrochemical conditions, and no external chemical bases were needed. This mild method offers a novel strategy for the late-stage functionalization of various natural alcohols.
Rhodium-catalyzed asymmetric hydrogenation of olefins with PhthalaPhos, a new class of chiral supramolecular ligands
Pignataro, Luca,Boghi, Michele,Civera, Monica,Carboni, Stefano,Piarulli, Umberto,Gennari, Cesare
supporting information; experimental part, p. 1383 - 1400 (2012/03/27)
A library of 19 binol-derived chiral monophosphites that contain a phthalic acid diamide group (Phthala- Phos) has been designed and synthesized in four steps. These new ligands were screened in the rhodium-catalyzed enantioselective hydrogenation of prochiral dehydroamino esters and enamides. Several members of the library showed excellent enantioselectivity with methyl 2-acetamido acrylate (6 ligands gave >97% ee), methyl (Z)-2- acetamido cinnamate (6 ligands gave >94% ee), and N-(1-phenylvinyl)acetamide (9 ligands gave >95% ee), whilst only a few representatives afforded high enantioselectivities for challenging and industrially relevant substrates N-(3,4-dihydronaphthalen-1- yl)-acetamide (96% ee in one case) and methyl (E)-2-(acetamidomethyl)-3- phenylacrylate (99% ee in one case). In most cases, the new ligands were more active and more stereoselective than their structurally related monodentate phosphites (which are devoid of functional groups that are capable of hydrogen-bonding interactions). Control experiments and kinetic studies were carried out that allowed us to demonstrate that hydrogen-bonding interactions involving the diamide group of the PhthalaPhos ligands strongly contribute to their outstanding catalytic properties. Computational studies carried out on a rhodium precatalyst and on a conceivable intermediate in the hydrogenation catalytic cycle shed some light on the role played by hydrogen bonding, which is likely to act in a substrate-orientation effect.
Isoquinoline derivatives with angiogenesis inhibiting activity
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, (2008/06/13)
The invention relates to compounds of formula I wherein r is from 0 to 2; n is from 0 to 2; m is from 0 to 4; A, B, D and E are each independently of the others N or CH, with the proviso that not more than two of those radicals are N; G is lower alkylene, —CH2—O—, —CH2—S—, —CH2—NH—, oxa (—O—), thia (—S—) or imino (—NH—), or is lower alkylene substituted by acyloxy or by hydroxy; Q is lower alkyl, especially methyl; R is H or lower alkyl; X is imino, oxa or thia; Y is lower alkyl or, especially, aryl, heteroaryl or unsubstituted or substituted cycloalkyl; and Z is amino, mono- or di-substituted amino, halogen, alkyl, substituted alkyl, hydroxy, etherified or esterified hydroxy, nitro, cyano, carboxy, esterified carboxy, alkanoyl, carbamoyl, N-mono- or N,N-di-substituted carbamoyl, amidino, guanidino, mercapto, sulfo, phenylthio, phenyl-lower alkylthio, alkylphenylthio, phenylsulfinyl, phenyl-lower alkylsulfinyl, alkylphenyl-sulfinyl, phenylsulfonyl, phenyl-lower alkanesulfonyl or alkylphenylsulfonyl, and where, if more than one radical Z is present (m≧4), the substituents Z are identical or different; and wherein the bonds indicated by a wavy line are either single bonds or double bonds; or an N-oxide of the mentioned compound, wherein one or more N atoms carry an oxygen atom; or a salt thereof. The compounds inhibit especially angiogenesis.
