Ring opening of photogenerated azetidinols as a strategy for the synthesis of aminodioxolanes

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Abstract

α-Aminoacetophenones are identified as promising building blocks for the synthesis of highly substituted dioxolanes. The presented strategy is founded on the build and release of molecular strain and achieves a formal transposition of a methyl group. During light irradiation, 3-phenylazetidinols are forged as reaction intermediates, which readily undergo ring opening upon the addition of electron-deficient ketones or boronic acids. Key to the successful development of this two-step process is the identification of a benzhydryl-protecting group, which orchestrates the photochemical Norrish–Yang cyclization and facilitates the subsequent ring opening.

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Beilstein journal of organic chemistry, 20, Beilstein-Institut zur Förderung der Chemischen Wissenschaften, Frankfurt, Main, 2024, https://doi.org/10.3762/bjoc.20.148

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