Preparation of 2‐(1<i>H</i>‐pyrazol‐5‐yl)benzenesulfonamides from polylithiated C(α),N‐carbo‐<i>tert</i>‐butoxyhydrazones and methyl 2‐(aminosulfonyl)benzoate
作者:John D. Knight、Jordan B. Brown、Jason S. Overby、Charles F. Beam、N. Dwight Camper
DOI:10.1002/jhet.5570450122
日期:2008.1
Select C(α), N-carbo-tert-butoxyhydrazones were dilithiated with excess lithium diisopropylamide followed by condensation with methyl 2-(aminosulfonyl)benzoate, acid cyclization, hydrolysis, and decarboxylation to afford new 2-(1H-pyrazol-5-yl)benzenesulfonamides, [NH-pyrazolyl-ortho-benzene-sulfonamides].