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Obituary
Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Paper | Special issue | Vol 90, No. 1, 2015, pp.344-356
Published online, 19th June, 2014
Published online, 19th June, 2014
DOI: 10.3987/COM-14-S(K)25
■ Group-Assisted Purification (GAP) for Protection of Amino Acids Using N-Phosphonyl Functional Groups
Guanghui An, Cole Seifert, Hao Sun, Yi Pan, and Guigen Li*
*Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, U.S.A.
Abstract
Various phosphonyl halides have been synthesized and utilized as protection groups for amino acids. The protection synthesis was performed via GAP (Group-Assisted Purification) procedure under convenient conditions without the use of column chromatography and recrystallization. The synthesis can be carried out on applicational scales with excellent yields (82% - 98%). The phosphonyl protection of amino acids would provide a new greener tool for GAP peptide synthesis.
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