Simple N,N'-dimethyl diaza-crown ethers react with bis(2-iodoethyl)-ether (2a) and 1,2-bis(2-iodoethoxy)ethane (2b) under high pressure (10 kbar) to give bis-quaternary salts which are demethylated in good yield by triphenylphosphine in boiling dimethylformamide yielding simple cryptands.
Pietraszkiewicz, Marek,Salanski, Piotr,Jurczak, Janusz
p. 433 - 436
(2007/10/02)
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