Convenient preparations of the three 2,3-dihalo-1,4-benzoquinones

摘要

Efficient preparations of 2,3-dichloro-1,4-benzoquinone (1) and 2,3-dibromo-1,4-benzoquinone (2) from 1,4-benzoquinone are reported, as is the synthesis of the previously unknown 2,3-diiodo-1,4-benzoquinone (3) from 2.