Three-Component Synthesis of α-Aminoperoxides Using Primary and Secondary Dialkylzinc Reagents with O<sub>2</sub> and α-Amido Sulfones
作者:Alicia Monleón、Marc Montesinos-Magraner、Amparo Sanz-Marco、Gonzalo Blay、José R. Pedro
DOI:10.1021/acs.orglett.0c01692
日期:2020.7.17
synthesis of unprecedented α-aminoperoxides bearing primary and secondary alkylperoxide substituents is described. Commercially available dialkylzinc reagents are oxidized with molecular oxygen and the consequent peroxide species react with stable (hetero)aromatic and aliphatic α-amido sulfones in excellent yields (>90%). The now available α-aminoperoxides are of potential interest in medicinal chemistry
Synthesis of Densely Functionalised 5-Halogen-1,3-oxazin-2-ones by Halogen-Mediated Regioselective Cyclisation of<i>N</i>-Cbz-Protected Propargylic Amines: A Combined Experimental and Theoretical Study
作者:Alicia Monleón、Gonzalo Blay、Luis R. Domingo、M. Carmen Muñoz、José R. Pedro
DOI:10.1002/chem.201302089
日期:2013.10.25
A very efficient synthesis of 5‐halogen‐1,3‐oxazin‐2‐ones has been accomplished by the halocyclisation reaction of chiral nonracemic N‐carbobenzyloxy (N‐Cbz)‐protected propargylic amines by using I2, Br2 and Cl2 as electrophile sources. The nature of the halogen influences the reaction time and yield. However, in all cases the reaction is totally regioselective taking place through a 6‐endo‐dig process
Improved facile synthesis of α-amino phosphonates by the reaction of α-amido sulfones with dialkyl trimethyl silyl phosphites catalyzed by Fe(III) chloride
作者:Boyapati Veeranjaneyulu、Biswanath Das
DOI:10.1080/00397911.2016.1270323
日期:2017.3.4
ABSTRACT An improved efficient synthesis of α-aminophosphonates has been discovered by the reaction of N-benzyloxycarbonylamino sulfones with dialkyl trimethyl silyl phosphites in the presence of FeCl3 as a catalyst. The products were formed in high yields (86–94%) within 2–4 h. The catalyst is inexpensive, easily available, and highly active. The unreacted dialkyl trimetyl silyl phosphites can easily
Catalytic Enantioselective Cyclopropylalkynylation of Aldimines Generated In Situ from α-Amido Sulfones
作者:Alicia Monleón、Gonzalo Blay、José R. Pedro
DOI:10.3390/molecules27123763
日期:——
procedure of synthesis of N-carbamoyl-protected propargylic amines substituted with a cyclopropyl group fromα-amidosulfones and cyclopropylacetylene is described. The reaction is catalyzed by a chiral BINOL-type zinc complex and provides the corresponding products in good yields and enantioselectivities.