摘要:
Synthesis is reported of a new tricyclic amino acid, (+/-)-(rel-2S,3R)-2-carboxy-1,2,3,4,5,6-hexahydro -8-hydroxy-1,5-methano-3-methyl-3-benzazocine (2), which contains within its structure the elements of a tyrosine moiety having chi(1) and chi(2) angles (168 degrees and -95 degrees, respectively) constrained to values observed for a phosphotyrosyl (pTyr) residue bound to the 56(lck) SH2 domain (chi(1) and chi(2) values of 163 degrees and -94 degrees, respectively). Additionally, the phi angle of N-acylated 2 correlates well with the phi angle of the SH2 domain-bound pTyr residue. Compound 2 represents a unique, highly constrained amino acid which may be of value in signal transduction studies.