A Practical Aryl Unit for Azlactone Dynamic Kinetic Resolution: Orthogonally Protected Products and A Ligation-Inspired Coupling Process
作者:Sean Tallon、Francesco Manoni、Stephen J. Connon
DOI:10.1002/anie.201406857
日期:2015.1.12
The first strategy for bringing about enantioselectiveazlactonedynamickineticresolution to generate orthogonally protected amino acids has been developed. In the presence of a C2‐symmetric squaramide‐based catalyst, benzyl alcohol reacts with novel yet readily prepared tetrachloroisopropoxycarbonyl‐substituted azlactones to generate trapped phthalimide products of significant synthetic interest
Efficient synthesis of protected cyclopropyl β-aspartylphosphates
作者:Luke A. Adams、Jonathan P. H. Charmant、Russell J. Cox、Magnus Walter、William G. Whittingham
DOI:10.1039/b311322a
日期:——
The in situ reaction of protected dehydroamino acids with derivatives of vinyldiazomethane leads to good to excellent yields of vinyl cyclopropanes via 3 + 2 dipolar cycloaddition followed by N(2) extrusion. Chromatographic separation of the cyclopropane diastereomeric products, followed by characterisation by (1)H NMR and X-ray crystallography allowed the cis and trans diastereomers to be easily identified
Selective and rapid oxidation of primary, allylic and benzylic alcohols to the corresponding carbonyl compounds with NaNO2–acetic anhydride under mild and solvent-free conditions
作者:Babasaheb P. Bandgar、Vaibhav S. Sadavarte、Lavkumar S. Uppalla
DOI:10.1039/b001215g
日期:——
Various primary, benzylic and allylic alcohols undergo selective and rapid oxidation to the corresponding carbonyl compounds using NaNO2–acetic anhydride as a novel oxidant under mild and solvent free conditions.
Solution-phase synthesis of an O-phosphoseryl-containing peptide using phenyl phosphorotriester protection
作者:J.W. Perich、P.F. Alewood、R.B. Johns
DOI:10.1016/s0040-4039(00)84262-8
日期:1986.1
The solution-phase synthesis of TFA · H2-Glu-PSer-Leu is reported usinq the protected phosphoroamino acid, N-tert-butoxycarbonyl-O-(diphenylphosphoro)-L-serine