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Epoxide to a larger cyclic ether?

i thought the first step must be using gringard to add carbons, but i need a hydroxyl group on the carbon on the other side to make it diol and produce the wanted product, but nothing seems to be working, any hints please?

Categories
Ask Chemistry

Epoxide to a larger cyclic ether?

i thought the first step must be using gringard to add carbons, but i need a hydroxyl group on the carbon on the other side to make it diol and produce the wanted product, but nothing seems to be working, any hints please?

Categories
Ask Chemistry

Epoxide to a larger cyclic ether?

i thought the first step must be using gringard to add carbons, but i need a hydroxyl group on the carbon on the other side to make it diol and produce the wanted product, but nothing seems to be working, any hints please?