procedure for the conversion of cis hexahydro-1,3,5-trinitro-1,3,5-triazine dibenzo (b, d) pyran - 9 million for the trans - hexahydro-1,3,5-trinitro-1,3,5-triazine dibenzo (b, d) pyran - 9 - regions

摘要

Reaction of cis-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9H- dibenzo[b,d]pyran-9-ones with an aluminum halide in an unreactive organic solvent effects complete epimerization to provide the corresponding trans-1-hydroxy-3-substituted-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-9 H-dibenzo[b,d]pyran-9-one.