Stable Oxypyridinium Triflate (OPT) Salts for the Synthesis of Halobenzyl Ethers
摘要:
A collection of new oxypyridinium triflate reagents (1a-d) for the synthesis of halobenzyl ethers from alcohols under "mix-and-heat" conditions is described. The reagents are stable organic salts that can be stored indefinitely and handled without special precautions, making them attractive for general use in organic synthesis. Halobenzylation of representative alcohols occurs in good to excellent yield.
Diallyltriazinedione‐type alkylating agents (ATTACKs‐R) with various alkyl groups (R) have been developed for the acid‐catalyzed alkylation of alcohols. ATTACKs‐R were prepared through a palladium‐catalyzed O‐N allylic rearrangement of 2,4‐bis(allyloxy)‐6‐chloro‐1,3,5‐triazine followed by substitution of the chloro group with an alcohol.