Derivatization of cysteamine hydrochloride by benzaldehyde

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PRAVEEN PALIWAL
PRAVEEN PALIWAL's picture
Derivatization of cysteamine hydrochloride by benzaldehyde

SIr,

I want to derivatized the
Cysteamine hydrochloride by  Benzaldehyde. I just prepare the 10% solution  of benzaldehyde and add in to methanlic solution of  Cysteamine hydrochloride. The 200 ppm Cysteamine hydrochloridesolution I have to use. I inject the solution on HPLC but no peak was found except the benzaldehyde. What is reason behind this. SHould I introduce the NaBH4 soltion into his of I have directly use bemzoyl chloride to derivatized it.
I also want to know from u that what is basic priciple to derivatized the amine or amine salts.

Best regards

Praveen