L-Phenylalanine, N-[(1,1-dimethylethoxy)carbonyl]- → HCID 131720850, compound

Participants

Reaction Steps

72.8 mg of benzyl (6-aminomethyl-3,7-dimethoxy-10-hexylphenothiazin-4-yl)-acetate trifluoroacetate were reacted with 39.7 mg of Boc-Phe-OH analogously to that described in Example 4.7.1. The crystalline benzyl [6-((N-tert.-butoxycarbonyl-L-phenylalanyl)-aminomethyl)-10-hexyl-3,7-dimethoxyphenothiazin-4-yl]-acetate obtained was dissolved in trifluoroacetic acid, whereupon the solution was left to stand at 20° for 10 minutes and concentrated in a vacuum. The residue was dissolved in 3 ml of DMF, whereupon 84.3 mg of Z-Tyr(Bzl)-ONp were added and the pH value was adjusted to 8.5 with DIPEA. After 3 hours the reaction mixture was worked up as described in Example 4.7.1. The crystalline benzyl [6-(((N,O-bis-benzyloxycarbonyl-L-tyrosyl)-L-phenylalanyl)-aminomethyl)-10-hexyl-3,7-dimethoxy-phenothiazin-4-yl]-acetate obtained was further processed analogously to that described in Example 2.2.1., whereby the crude product was crystallized from ethanol. 21.3 mg of 10-hexyl-3,7-dimethoxy-4,6-cyclo-[acetyl-L-tyrosyl-L-phenylalanyl-aminomethyl]phenothiazine were obtained; MS: 723.5 MH+.

Provenance & Evidence