释义 |
los·sen rearrangement \ˈläsən-\ noun Usage: usually capitalized L Etymology: probably after Wilhelm Lossen died 1906 German chemist : the conversion of a hydroxamic acid RCONHOH to an amine RNH2, a urea (RNH)2CO, a urethane RNHCOOC2H5, or a similar derivative by way of an intermediate isocyanate RNCO |