Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Principle of the safety‐catch backbone protecting groups using Hmsb: (i) 1.1 eq. of the corresponding salicylaldehyde in DMF; (ii) NaBH4, DMF; (iii) continuing SPPS; (iv) standard TFA cleavage; (v) NH4I/DMS reduction; (vi) standard TFA cleavage.
