syn-1,2-dialkylated calix[4]arenes : general intermediates in the NaH/DMF tetraalkylation of calix[4]arenes

Leo C. Groenen, Bianca H.M. Ruël, Alessandro Casnati, Peter Timmerman, Willem Verboom, Sybolt Harkema, Andrea Pochini, Rocco Ungaro, David N. Reinhoudt

Tetrahedron Letters · 1991 · 115 citations · 11 references

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