N-tosyl-L-tyrosine

Fig. 3. N-tosyl L-tyrosine (III) ORD curves in function of the pH and of the excess potassium...

Fig. 10. ORD curves of polycondensates of N-tosyl L-tyrosine (III) with HCHO prepared in acidic medium (IX) with different initial proportion of HCHO (solvent dioxanne)...

The special case of the formophenolic polycondensate of N-tosyl L-tyrosine prepared in acidic medium suggested to us a possible simplification in the interpretation of the optical activity of polymers in random coils. 

This argument has led us to suspect the reaction of formaldehyde on the sulfonamide functions during the formophenolic polycondensation of N-tosyl L-tyrosine in the acidic medium mentioned previously [15]. 

Boc-Gly-OH Boc-Pro-OH Boc-Leu-OH Boc-Trp-OH Pyroglutamic acid Boc-His(Tosyl)-OH N,N -Dicyclohexylcarbodiimide N-Boc, O-2-bromobenzoyloxycarbonyl-L-tyrosine Benzhydrylamino-polystyrene-divinylbenzene resin... 

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