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. 2014 Jan 8;10:34–114. doi: 10.3762/bjoc.10.6

Table 21.

Examples of 1,2,4-trioxanes synthesized by oxidation of 2Н-pyrans.

Pyran 350 Reaction conditions 1,2,4-Trioxane 351 Yield, % Reference
graphic file with name Beilstein_J_Org_Chem-10-34-i393.jpg O2, hν, benzene graphic file with name Beilstein_J_Org_Chem-10-34-i394.jpg 85–90 [399]
graphic file with name Beilstein_J_Org_Chem-10-34-i395.jpg Air, Rose Bengal, hν, THF, −78 °C graphic file with name Beilstein_J_Org_Chem-10-34-i396.jpg 94 [400]
graphic file with name Beilstein_J_Org_Chem-10-34-i397.jpg Air, Rose Bengal, hν, CH2Cl2, −78 °C graphic file with name Beilstein_J_Org_Chem-10-34-i398.jpg 65 [401]