Monosubstituted phosphinic acids are esterified with orthosilicates in excellent yields. Phosphinylidene-containing acids react selectively under these conditions, while disubstituted phosphinic acids and phosphonic acids remain unchanged. One-pot procedures are also described for the preparation of phosphinate esters from an alcohol. This novel method provides a convenient and general alternative to more commonly employed conditions such as diazomethane or carbodiimide.
Acetaldehyde, acetyl chloride, and acrolein add to one of the n-ally1 groups of dodecatrienylnickel (1) giving long chain organic compounds; in the presence of allyl bromide, addition to both n-ally1 groups occurs giving products of increased chain length.
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