(R)-Solketal → (R)-tert-Butoxycarbonylamino-[4-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethoxy)-phenyl]-acetic acid

Participants

Reaction Steps

Prepared by the same method as described in example 1 except that (i) (R)-tert-butoxycarbonylamino-[4-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethoxy)-phenyl]-acetic acid was used in place of (R)-tert-butoxycarbonylamino-[4-(2-tert-butoxy-ethoxy)-phenyl]-acetic acid in step 74-G and (ii) cyclization of (R)-2-amino-N-{(1S,2S)-1-[4-chloro-5-(2-fluoro-4-iodo-phenyl)-1H-imidazol-2-yl]-2-phenyl-propyl}-2-[4-((S)-2,3-dihydroxy-propoxy)-phenyl]-acetamide in step 74-H was performed as described in step 34-H. (R)-tert-Butoxycarbonylamino-[4-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethoxy)-phenyl]-acetic acid was prepared as described in steps 33-T and 33-U except that in step 70-T (R)-2,2-dimethyl-1,3-dioxolane-4-methanol was used in place of (S)-2,2-dimethyl-1,3-dioxolane-4-methanol. HR-MS: calcd for C30H27ClFlN4O5 [M+H+] 705.0772. Found 705.0771.

Provenance & Evidence