Sulfamic Acid and its N-Substituted Derivatives

Sulfamic acid chemistry was extensively reviewed by Audrieth, Sveda, Sisler, and Butler in Chemical Reviews in 1940.¹ Later, the reviews of Gilbert² (1965) and of Burton and Nickless³ (1969) updated the Audrieth review. These two reviews cover the literature comprehensively up to the early sixties. Some broad industrial aspects of sulfamic acid chemistry have been reviewed about 1956^4a and in 1969.^4b Some other early, limited or perhaps not readily available reviews have appeared.⁵ At the Sympsoium on Sulfamic Acid in Milan in 1966, Bicelli⁶ presented a short review on sulfamic acid and sulfamates, and Romagnani⁷ gave a bibliography with over 450 references on sulfamic acid and its electrometallurgical applications. Scott and Spillane^8-10 have reviewed the important mechanistic aspects of sulfamic acid chemistry to about the end of 1972. In the last review¹⁰of the series, synthetic developments for most of 1970 through 1971 and part of 1972 were also noted.