Shu, Chao published the artcilePhotoredox-Catalyzed Cyclobutane Synthesis by a Deboronative Radical Addition-Polar Cyclization Cascade, SDS of cas: 238088-16-9, the publication is Angewandte Chemie, International Edition (2019), 58(12), 3870-3874, database is CAplus and MEDLINE.
Photoredox-catalyzed methylcyclobutanations of boronic esters are described. The reactions proceed through single-electron transfer induced deboronative radical addition to an electron-deficient alkene followed by single-electron reduction and polar 4-exo-tet cyclization with a pendant alkyl halide. Key to the success of the methodol. was the use of easily oxidizable arylboronate complexes. Structurally diverse cyclobutanes are shown to be conveniently prepared from readily available boronic esters and a range of haloalkyl alkenes. The mild reactions display excellent functional group tolerance, and the radical addition-polar cyclization cascade also enables the synthesis of 3-, 5-, 6-, and 7-membered rings.
Angewandte Chemie, International Edition published new progress about 238088-16-9. 238088-16-9 belongs to nitriles-buliding-blocks, auxiliary class Nitrile,Boronic acid and ester,Aliphatic cyclic hydrocarbon,Boronic Acids,Boronate Esters, name is 4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)butanenitrile, and the molecular formula is C11H10O3, SDS of cas: 238088-16-9.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
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