a maitland–japp inspired synthesis of dihydropyran-4-ones and
methyl 2-(2-allyl-3-((1s,6s)-1-hydroxy-6-((tetrahydro-2h-pyran-2
5isobutoxy4oxo4hpyran2carboxylicacid1040717143
((s)-benzyl (1-(tetrahydro-2h-pyran-4-yl)ethyl)carbamate)
4oxo6propyl4hpyran2carboxylicacid1040717256