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9.9.1.3.1.1.5 Method 5: Cyclization of 4,4-Dialkoxyalkan-1-ones

DOI: 10.1055/sos-SD-009-00244

König, B.Science of Synthesis, (20019206.

1,4-Diketones are used in protected form, e.g. as acetals 114 or thioacetals 116, for the synthesis of furans 115 or 117 (Scheme 39). Acetal-protected derivatives have mainly been employed.[‌189‌‌195‌] The cyclization occurs under typical deprotection conditions, e.g. with acids in the case of acetals and with mercury(II) catalysts in the case of dithioacetals.

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