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The synthesis of novel crown ethers

✍ Scribed by D.N. Reinhoudt; R.T. Gray

Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
189 KB
Volume
16
Category
Article
ISSN
0040-4039

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✦ Synopsis

Che synthesis and chemistry of macrocyclic polyethers are currently receiving a great deal of attention. Very recently Cram and co-workers 132 have reported the synthesis of two crown ethers (3,~ and QJ). We have prepared two series of novel crown ethers in which respectively, the 1,3and 2,5-positions of a benzene and a furan ring are linked via a polyethylene glycol chain. As 3,~ and Q are members of these series, the communications of Cram et al. have prompted us to dis. close the preliminary results of our work. A series of disodium or dipotassium polyethylene glycolates (derived from 2s) were reacted with equimolar amounts of 1,3-bis(bromomethyl)benzene (1) in apolar solvents without using high dilution conditions (0.1 cient to effect complete ,-;_ 0 L 3 M concentration) . Reaction times of 1 to 3 hours at 110 T were suffi- conversion of the starting materials.

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