The scaffold of fenestranes is quite unique, as it contains four condensed cycles and a distorted tetracoordinated central carbon atom with bond angles greater than the regular 109°28". In this Minireview, a detailed overview on the developments regarding this compound class, including their synthesis, is given for the time period since 2006. In the past years, natural products that belong to the class of heterofenestranes have been isolated and their syntheses will also be discussed.

In the presence of enolizable carbonyl compounds, hemiaminals of fluoral and related polyfluoroaldehydes behave as equivalents of fluoroalkyl iminium compounds and provide beta-polyfluoroalkyl beta-dialkylamino ketones, which are easily transformed, under acidic conditions, into beta-polyfluoroalkylenones.

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A facile and efficient synthetic route to 3-substituted chromones and quinolones was developed. Silver triflate was employed to activate the electrophile to react with various readily available enaminones.

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We herein report the design, synthesis and photophysical characterization of extended and rigid coumarinyl derivatives showing large two-photon sensitivities (daFu up to 125 GM) at 740 and 800 nm. To efficiently synthesize these complex PPGs, stepeconomic domino reactions were used. Moreover, those new coumarinyl PPGs display unique bathochromic shifts (≤100 nm) of the uncaging sub-products as a result of the formation of a more conjugated fulvene moiety.