908249-09-2Relevant academic research and scientific papers
Transition-Metal-Free Oxidative Cross-Coupling of Triorganoindium Reagents with Tetrahydroisoquinolines
Gil-Negrete, José M.,Pérez Sestelo, José,Sarandeses, Luis A.
, p. 9778 - 9785 (2019/08/28)
Triorganoindium reagents (R3In) react with tetrahydroisoquinolines (THIQs) in the presence of Ph3CBF4 as an oxidant to afford 1-substituted THIQs. The reaction proceeds in good yields at rt using 50 mol % R3In with a variety of organic groups. 1H NMR studies show the generation of an iminium ion intermediate, supporting a two-step mechanism based on THIQ oxidation and R3In nucleophilic addition. This reaction was applied to the synthesis of the alkaloid nuciferine in three steps.
Practical metal-free C(sp3)-H functionalization: Construction of structurally diverse α-substituted N-benzyl and N-allyl carbamates
Xie, Zhiyu,Liu, Lei,Chen, Wenfang,Zheng, Hongbo,Xu, Qingqing,Yuan, Huiqing,Lou, Hongxiang
supporting information, p. 3904 - 3908 (2014/05/06)
Described is a practical and universal C-H functionalization of readily removable N-benzyl and N-allyl carbamates, with a wide range of nucleophiles at ambient temperature promoted by Ph3CClO4. The metal-free reaction has an excellent functional-group tolerance, and displays a broad scope with respect to both N-carbamates and nucleophile partners (a variety of organoboranes and C-H compounds). The synthetic utility in target- as well as diversity-oriented syntheses is demonstrated. Strategic play: A direct functionalization of the title carbamates with a wide range of nucleophiles has been developed. The reaction proceeds efficiently at low temperature using Ph3CClO4 as an oxidant. Sensitive functional groups are tolerated, thus allowing applications in natural product synthesis, the construction of chemical libraries, and the discovery of potential anticancer targets.
Affinity of?1-aryl-1,2,3,4-tetrahydroisoquinoline derivatives to?the?ion channel binding site of?the?NMDA receptor complex
Ludwig, Matthias,Hoesl, Cornelia E.,H?fner, Georg,Wanner, Klaus T.
, p. 1003 - 1010 (2008/02/09)
A series of 1-aryl-1,2,3,4-tetrahydroisoquinoline and 8-methyl-1-aryl-1,2,3,4-tetrahydroisoquinoline derivatives was evaluated for affinity to the PCP binding site of the NMDA receptor complex. The (S)-configurated tetrahydroisoquinoline derivative (S)-4e·HCl bearing a 2-methylphenyl substituent in position 1 of the heterocyclic ring system and a methyl group in position 8 was found to exhibit the highest affinity among the derivatives with a Ki-value of 0.0374?μM. In addition, this compound shows a remarkable enantioselectivity of binding by being almost 90 times more potent than the corresponding (R)-enantiomer (R)-4e·HCl. Additionally, a convenient and efficient synthetic approach to racemic 1-aryl-1,2,3,4-tetrahydroisoquinoline derivatives is described.
