... [CONTRIBUTION FROM THE DEPARTMENI OF CHEMISTRY, COLUMBIA UNIVERSITY ... Vol. ... 2,4-dirnethyl-5-chloro-2-pentanol was cyclized to 2,2,4-trimethyltetrahydrofuran and identified by spectra and analysis; infrared: strong ether band at 9.2 H; nmr: multiplet at 8.59 T us. ...