Benzyl Chloroformate CAS 501-53-1 for Organic Synthesis Intermediate

Benzyl chloroformate

CBZ; Benzyl carbonochloridate; BCF; BENZYLOXYCARBONYL CHLORIDE; Benzyl Chlorofomate; CBZ CHLORIDE; CARBOBENZOXY CHLORIDE; Z-CHLORIDE

Benzyl chloroformate, also known as benzyl chlorocarbonate or Z-chloride, is the benzyl ester of chloroformic acid. It can be also described as the chloride of the benzyloxycarbonyl (Cbz or Z) group. In its pure form it is a water-sensitive oily colorless liquid, although impure samples usually appear yellow. It possesses a characteristic pungent odor and degrades in contact with water.
The compound was first prepared by Leonidas Zervas in the early 1930s who used it for the introduction of the benzyloxycarbonyl protecting group, which became the basis of the Bergmann-Zervas carboxybenzyl method of peptide synthesis he developed with Max Bergmann. This was the first successful method of controlled peptide chemical synthesis and for twenty years it was the dominant procedure used worldwide until the 1950s. To this day, benzyl chloroformate is often used for amine group protection.

Benzyl chloroformate is used as a reagent in peptide synthesis to protect the amine functionality as the benzyloxycarbonyl (Cbz or Z) derivative.
Cbz-protected anilines were prepared directly from aromatic carboxylic acids, sodium azide and Cbz-Cl.
Protecting reagent in peptide synthesis.

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