Studies on the synthesis of Stemona alkaloids; stereoselective preparation of the hydroindole ring system by oxidative cyclization of tyrosine
作者:Peter Wipf、Yuntae Kim
DOI:10.1016/s0040-4039(00)61121-8
日期:1992.9
The core hydroindole ring system of the Stemona alkaloids was prepared by oxidation of tyrosine with a hypervalentiodine reagent followed by a diastereotopic group-selective intramolecular conjugate addition. Further transformations illustrate the versatility of the highly functionalized hydroindolenone 3 for alkaloid synthesis.
Ley, Steven V.; Thomas, Andrew W.; Finch, Harry, Journal of the Chemical Society. Perkin transactions I, 1999, # 6, p. 669 - 671
作者:Ley, Steven V.、Thomas, Andrew W.、Finch, Harry
DOI:——
日期:——
Synthesis and Site-Specific Incorporation of Red-Shifted Azobenzene Amino Acids into Proteins
作者:Alford A. John、Carlo P. Ramil、Yulin Tian、Gang Cheng、Qing Lin
DOI:10.1021/acs.orglett.5b03268
日期:2015.12.18
A series of red-shifted azobenzene amino acids were synthesized in moderate-to-excellent yields via a two-step procedure in which tyrosine derivatives were first oxidized to the corresponding quinonoidal spirolactories followed by ceric Ammonium nitrate-catalyzed azo formation with the substituted phenylhydrazines. The resulting azobenzene-Alanine derivatives exhibited efficient trans/cis photoswitching upon irradiation With a blue (448 nm) or green (530 nm) LED light Moreover, nine superfolder green fluorescent protein (sfGFP) Mutants carrying the atobenzene-alanine analogues Were expressed in E. coli in good yields via amber codon suppression with an orthogonal tRNA/Py1RS pair, and one of the mutants showed durable photoswitching with the LED light.