14-crown-4-ether derivatives

摘要

Named compounds are useful in making dry analytical elements for assaying lithium in serum. The compounds have the general structure: ##STR1## wherein R, R.sub.1, R.sub.2 and X are as presented below: PP ______________________________________ PPR R.sub.1 R.sub.2 X PP ______________________________________ PPn-C.sub.12 H.sub. 25 PP SO.sub.2 CH.sub.3 PP CH.sub.3 CH PPn-C.sub.12 H.sub.25 PP NO.sub.2 CH.sub. 3 CH PPCH.sub.3 SO.sub.2 N(n-C.sub.6 H.sub.13).sub.2 PP CH.sub.3 CH PPCH.sub.2 C.sub.6 H.sub.5 PP SO.sub.2 N(n-C.sub.6 H.sub.13).sub.2 PP CH. sub.3 CH PPCH.sub.2 C.sub.6 H.sub.5 PP SO. sub.2 N(CH.sub.3)-n-C.sub.18 H.sub.37 PP CH.sub.3 CH PP CH.sub.3 NO.sub.2 n-C.sub.7 H.sub.15 P P CH PPn-C.sub.12 H.sub.25 PP H CH. sub.3 N PP______________________________________ PP