3,4-Bis(chloromethyl)pyridine → HCID 86741739, compound

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Reaction Steps

Using essentially the same procedure as in Example 1(a), tetraisopropyl methane diphosphonate is converted to tetraisopropyl dihydro-2-pyrindine-6,6-diphosphonate by reaction with 3,4-bis(chloromethyl)pyridine. The resulting ester is hydrolyzed as in Example 1(a) to yield dihydro-2-pyrindine-6,6-diphosphonic acid. The dihydro-2-pyrindine-6,6-diphosphonic acid is then converted to the octahydro-2-pyrindine-6,6-diphosphonic acid by a hydrogenation procedure which is essentially the same as in Example 1(b). Substituted octahydro-2-pyrindine-6,6-diphosphonic acid compounds are prepared as described hereinbefore in Example 1 by using as the starting material the appropriately substituted 3,4-bis(chloromethyl) pyridine.

Provenance & Evidence