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45.27.2.1.1 Method 1: One-Step Synthesis

DOI: 10.1055/sos-SD-045-01285

Haino, T.; Iwamoto, H.Science of Synthesis, (2010451215.

The synthesis of 5,11,17,23,29-penta-tert-butylcalix[5]arene-31,32,33,34,35-pentol (64) has been achieved by a condensation reaction between 4-tert-butylphenol (63) and para­formaldehyde in Tetralin under basic conditions in 6.2% yield.[‌63‌] The method has been improved to a yield of 16% (Scheme 31).[‌64‌]

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