Number | Date | Country | Kind |
---|---|---|---|
2553443 | Nov 1975 | DEX | |
2644433 | Oct 1976 | DEX |
Entry |
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houben-Weyl (I), Methoden der Organische Chemie, vol. X/2, p. 716, (1967). |
Houben-Weyl (II), Methoden der Organische Chemie, vol. XI/1, pp. 522-526, (1957). |
Whitmore et al., J. Am. Chem. Soc., vol. 59, pp. 1500-1503, (1937). |