Products from furans. VI. Synthesis of dihydro‐2‐disubstituted‐2 H ‐pyran‐3(4 H )‐ones, tetrahydro‐3‐(aminomethyl)‐2‐( p ‐methoxyphenyl)‐2‐methyl‐2 H ‐pyran‐3‐ol derivatives and 6‐( p ‐methoxyphenyl ‐6‐methyl‐7‐oxa‐1,3‐diazaspiro[4,5]decane‐2,4‐dione

Hydrogenolysis of 5,6‐dihydro‐6‐( p ‐methoxyphenyl)‐6‐methyl‐5‐oxo‐2 H ‐pyran‐2‐yl ethyl carbonate yielded dihydro‐2‐( p ‐methoxyphenyl)‐2‐methyl‐2 H ‐pyran‐3(4 H )‐one, 3 . Subsequently cyanohydrin 4 , derived from 3 , on reduction afforded 3‐(aminomethyl)tetrahydro‐2‐( p ‐methoxyphenyl)‐2‐methyl‐2 H ‐pyran‐3‐ol, 5 . The synthesis of N ‐dimethyl, N ‐isopropyl, N ‐imidazolyl as well as N ‐oxazolinyl derivatives of 5 is presented. The synthesis of 6‐( p ‐methoxyphenyl)‐6‐methyl‐7‐oxa‐1,3‐diazaspiro[4,5]decane‐2,4‐dione 10 , a spiro hydantoin prepared from ketone 3 is also reported.