The first synthesis of 4-trifluoromethyl-2H-pyrans by palladium-catalyzed cyclization of (E)-3-alkynyl-3-trifluoromethyl allylic alcohols
摘要:
The cross-coupling of (Z)-3-iodo-3-trifluoromethyl allylic alcohols 4 with terminal alkynes 5 in the presence of Pd(PPh3)(4) and CuI gave conjugated (E)-3-alkynyl-3-trifluoromethyl allylic alcohols 2 in high yield. 4-Trifluoromethyl-2N-pyrans 7 were prepared from the cyclization of 2 using PdCl2(CH3CN)(2) catalysis. (C) 2000 Elsevier Science Ltd. All rights reserved.
The first synthesis of 4-trifluoromethyl-2H-pyrans by palladium-catalyzed cyclization of (E)-3-alkynyl-3-trifluoromethyl allylic alcohols
摘要:
The cross-coupling of (Z)-3-iodo-3-trifluoromethyl allylic alcohols 4 with terminal alkynes 5 in the presence of Pd(PPh3)(4) and CuI gave conjugated (E)-3-alkynyl-3-trifluoromethyl allylic alcohols 2 in high yield. 4-Trifluoromethyl-2N-pyrans 7 were prepared from the cyclization of 2 using PdCl2(CH3CN)(2) catalysis. (C) 2000 Elsevier Science Ltd. All rights reserved.
The first synthesis of 4-trifluoromethyl-2H-pyrans by palladium-catalyzed cyclization of (E)-3-alkynyl-3-trifluoromethyl allylic alcohols
作者:Feng-Ling Qing、Wen-Zhong Gao
DOI:10.1016/s0040-4039(00)01333-2
日期:2000.9
The cross-coupling of (Z)-3-iodo-3-trifluoromethyl allylic alcohols 4 with terminal alkynes 5 in the presence of Pd(PPh3)(4) and CuI gave conjugated (E)-3-alkynyl-3-trifluoromethyl allylic alcohols 2 in high yield. 4-Trifluoromethyl-2N-pyrans 7 were prepared from the cyclization of 2 using PdCl2(CH3CN)(2) catalysis. (C) 2000 Elsevier Science Ltd. All rights reserved.