79128-15-7Relevant academic research and scientific papers
Asymmetric Hetero Diels-Alder Reaction Catalyzed by Stable and Easily Prepared CAB Catalyst
Gao, Quingzhi,Ishihara, Kazuaki,Maruyama, Tohru,Mouri, Makoto,Yamamoto, Hisashi
, p. 979 - 988 (2007/10/02)
A stable chiral (acyloxy)borane (CAB) complex is prepared in situ by mixing a tartaric acid derivative and arylboronic acids at room temperature.A solution of the catalyst is effective in catalyzing hetero Diels-Alder reactions to produce dihydropyrone derivatives of high optical purities.
Potential Neuroleptic Agents. 2,6-Dialkoxybenzamide Derivatives with Potent Dopamine Receptor Blocking Activities
Florvall, Lennart,Oegren, Sven-Ove
, p. 1280 - 1286 (2007/10/02)
A series of some novel N-(1-ethyl-2-pyrrolidinylmethyl)benzamides was synthesized and tested for dopamine receptor blockade in vivo by the ability to block the apomorphine syndrome in the rat.Several compounds were considerably more potent than sulpiride as dopamine receptor blockers and displayed low liability to induce extrapyramidal side effects (catalepsy) in the rat.The blockade of dopamine receptor activity in vivo was mainly confined to the levorotatory isomers having the S absolute configuration.The structure-activity relationships are discussed.
METALATION REACTIONS. VI. STERIC LIMITS IN THE PREPARATION OF 1,2,3-TRI-SUBSTITUTED BENZENE DERIVATIVES
Cabiddu, Salvatore,Maccioni, Antonio,Piras, Pier Paolo,Plumitallo, Antonio
, p. 123 - 128 (2007/10/02)
Metalation of 1,3-dialkoxy-, 1-alkoxy-3-(alkylthio)- and 1,3-bis-(alkylthio)-benzenes with n-butyllithium has been examined to verify the possibility of preparing 1,2,3-tri-substituted benzene derivatives.The reaction is affected by steric hindrance.The yields of the metalation in the position ortho to both the substituents decrease as steric requirement increases becoming zero when the bulk of both the alkyl substituent and the hetero-atom is increased.It has been shown that synthesis of 1,2,3-tri-substituted derivatives by this route is feasible only with small substituents.
