Novel base catalysed rearrangement of sultone oximes to 1,2-benzisoxazole- 3-methane sulfonate derivatives

• Veera Reddy Arava,
• Udaya Bhaskara Rao Siripalli,
• Vaishali Nadkarni and
• Rajendiran Chinnapillai

Beilstein J. Org. Chem. 2007, 3, No. 20, doi:10.1186/1860-5397-3-20

• )-one-2,2-dioxide Y = H), an obvious precursor for 5, was reported by Timoney et al., in an overall yield of ~30% [1] via the cyclisation of the methanesulfonate of salicylaldehyde followed by oxidation (Scheme 4). Results and discussion In order to prepare 6 in better yield, we choose methyl salicylate

• methanesulfonate of salicylaldehyde. Preparation of 1,2-benzoxathiin-4(3H)-one-2,2-dioxides. Preparation of sultone oximes. Preparation of 3-alkyl-1,2-benzisoxazole derivatives. Synthesis of zonisamide from 1,2-benzisoxazole-3-methane-sulfonate. Compounds 6a-i prepared. Compounds 5a-i prepared. Compounds 10a-i