N-Bis-trimethylsilylation of alpha-amino acids using the powerful trimethylsilyl triflate reagent is difficult, and is rendered impossible in the case of bulky side-chains (valine). However, favorable entropy changes resulting from a cyclization reaction allow the formation of "benzostabase" N-diprotections regardless of the side-chain bulk.
Cotte, Alain; Bader, Benjamin; Kuhlmann, Juergen, Chemistry - A European Journal, 1999, vol. 5, # 3, p. 922 - 936
作者:Cotte, Alain、Bader, Benjamin、Kuhlmann, Juergen、Waldmann, Herbert
DOI:——
日期:——
Buchholz, Michael; Kunz, Horst, Liebigs Annalen der Chemie, 1983, # 11, p. 1859 - 1885