Reported is a modular one‐step three‐component synthesis of tetrahydroisoquinolines using a Catellanistrategy. This process exploits aziridines as the alkylating reagents, through palladium/norbornene cooperative catalysis, to enable a Catellani/Heck/aza‐Michael addition cascade. This mild, chemoselective, and scalable protocol has broad substrate scope (43 examples, up to 90 % yield). The most striking
One-Pot Synthesis of β-Amino/β-Hydroxy Selenides and Sulfides from Aziridines and Epoxides
作者:Srinivasan Chandrasekaran、Venkataraman Ganesh
DOI:10.1055/s-0029-1216960
日期:2009.10
Diaryl disulfides and diselenides undergo facile cleavage on treatment with rongalite (sodium hydroxymethanesulfinate) to generate the corresponding thiolate and selenolate species in situ, which effect the ring opening of aziridines and epoxides in a regioselective manner. A simple, mild, cost-effective protocol has been developed to prepare β-amino and β-hydroxy sulfides and selenides in a one-pot operation.
Regioselective ring-opening of aziridines with diselenides and disulfides using the Zn/AlCl<sub>3</sub>system
作者:Barahman Movassagh、Elaheh Salehi Morovat
DOI:10.1080/17415993.2011.551938
日期:2011.4
An efficient Zn/AlCl3-promoted highly regioselective one-potprocedure has been demonstrated for the synthesis of β -amino selenides and sulfides from a variety of diselenides/disulfides and aziridines by reductive cleavage of Se–Se and S–S bonds using the Zn/AlCl3 system in acetonitrile under very mild conditions.
Ring Opening of Aziridines by Pendant Sulfamates Allows for Regioselective and Stereospecific Preparation of Vicinal Diamines
作者:Someshwar Nagamalla、Annu Anna Thomas、Appasaheb K. Nirpal、Joel T. Mague、Shyam Sathyamoorthi
DOI:10.1021/acs.joc.3c01731
日期:2023.11.17
The ringopening of aziridines by pendant sulfamates is a viable strategy for the rapid preparation of vicinal diamines. Our reaction is compatible with both disubstituted cis- and trans-aziridines; unsubstituted, N-alkyl, and N-aryl sulfamates engage effectively. In all cases examined, the cyclization reaction is perfectly regioselective and stereospecific. Once activated, the product oxathiazinane
Direct synthesis of unsymmetrical beta-sulfonamido disulfides by ring-opening of aziridines by using benzyltriethyl-ammonium tetrathiomolybdate 1 as a sulfur transfer reagent in the presence of symmetrical disulfides as thiol equivalents has been reported. Reaction of benzyl and alkyl disulfides gave unsymmetrical beta-sulfonamido disulfides as the only product in very good yields. From the Study, it has been observed that aryl disulfides containing p-NO2, p-Cl, and p-CN led to the formation of the corresponding beta-aminosulfides as the exclusive products. However, un-substituted aryl disulfides and the one containing electron-donating substituents (p-Me) provide a mixture of beta-sulfonamido mono- and disulfides as the products.