Tetrahedron Letters p. 5831 - 5834 (1997)
Update date:2022-08-02
Topics:
Fukuyama, Tohru
Cheung, Mui
Jow, Chung-Kuang
Hidai, Yuko
Kan, Toshiyuki
2,4-Dinitrobenzenesulfonamides, readily prepared from primary amines and 2,4-dinitrobenzenesulfonyl chloride, can be alkylated by the Mitsunobu reaction or by the conventional methods to give N,N-disubstituted sulfonamides in excellent yields. Since 2,4-dinitrobenzenesulfonamides can be removed without deprotecting 2-nitrobenzenesulfonamides, a wide variety of diamines could be prepared by the combined use of these protecting/activating groups.
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Doi:10.1016/S0040-4039(97)01605-5
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(1933)