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DOI: 10.1055/sos-SD-023-00535

Tidwell, T. T.Science of Synthesis, (200623614.

The direct dehydration of dialkylacetic acids 234 (R1=t-Bu, 1-adamantyl) bearing two bulky substituents can be achieved by using dicyclohexylcarbodiimide, giving the corresponding dialkylketenes 235 (Scheme 78).[‌180‌]

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