Regioselectivity of Pictet–Spengler cyclization: synthesis of halotetrahydroisoquinolines
摘要:
The regioselectivity of the Pictet-Spengler cyclization for the synthesis of isoquinolines depends on the aryl substituent at C-2. The ratio of halotetrahydroisoquinoline 4 to isoquinoline 3 increases with increasing electrophilicity of the aromatic ring (H much less than I < Br < Cl). (C) 2001 Elsevier Science Ltd. All rights reserved.
The regioselectivity of the Pictet-Spengler cyclization for the synthesis of isoquinolines depends on the aryl substituent at C-2. The ratio of halotetrahydroisoquinoline 4 to isoquinoline 3 increases with increasing electrophilicity of the aromatic ring (H much less than I < Br < Cl). (C) 2001 Elsevier Science Ltd. All rights reserved.
ITO K.; TANAKA H.; KAYAMA M., CHEM. AND PHARM. BULL. <CBT-AL>, 1977, 25, NO 6, 1249-1255