1352802-86-8Relevant academic research and scientific papers
Transient imine as a directing group for the metal-free o-C-H borylation of benzaldehydes
Rej, Supriya,Chatani, Naoto
supporting information, p. 2920 - 2929 (2021/03/01)
Organoboron reagents are important synthetic intermediates and have wide applications in synthetic organic chemistry. The selective borylation strategies that are currently in use largely rely on the use of transition-metal catalysts. Hence, identifying much milder conditions for transition-metal-free borylation would be highly desirable. We herein present a unified strategy for the selective C-H borylation of electron-deficient benzaldehyde derivatives using a simple metal-free approach, utilizing an imine transient directing group. The strategy covers a wide spectrum of reactions and (i) even highly sterically hindered C-H bonds can be borylated smoothly, (ii) despite the presence of other potential directing groups, the reaction selectively occurs at the o-C-H bond of the benzaldehyde moiety, and (iii) natural products appended to benzaldehyde derivatives can also give the appropriate borylated products. Moreover, the efficacy of the protocol was confirmed by the fact that the reaction proceeds even in the presence of a series of external impurities.
METHODS FOR PREPARING ISOQUINOLINES
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Paragraph 00192; 00193; 00194, (2013/03/26)
Provided herein are novel synthetic methods of making isoquinolines comprising coupling a metalated N-(2-methylbenzylidene)amine with a nitrile, followed by cyclization, to provide a substituted isoquinoline compound. This new methodology for preparing is
A versatile synthesis of substituted isoquinolines
Si, Chong,Myers, Andrew G.
supporting information; experimental part, p. 10409 - 10413 (2011/12/03)
Lithiated o-tolualdehyde tert-butylimines were shown to condense with nitriles to form eneamido anion intermediates that were trapped in situ with various electrophiles, thus affording a diverse array of highly substituted isoquinolines, many of which are
