Diazocarbonyl compounds are versatile precursors of carbenes leading to various structures by using several metal catalysts, especially copper and rhodium salts. In this study, eight different diazocarbonyls having N-O moiety were used. The N-O tethered structures were preferred because they may allow some useful transformations of the final products into valuable compounds via N-O cleavage. In the presence of double bond on the –OR function of the starting diazo compound, CuCl/AgSbF₆ catalyst yielded only cyclopropyl fused oxazinane / oxazepane derivatives over cyclopropanation while Rh₂(OAc)₄ catalyst was giving mainly isooxazolidinones via C-H insertion.

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CuCl / AgSbF6和Rh2（OAc）4的重氮化学合成NO束缚的三元环和五元环的比较

重氮羰基化合物是碳烯的通用前体，通过使用多种金属催化剂（特别是铜盐和铑盐）可形成各种结构。在这项研究中，使用了八个不同的具有NO部分的重氮羰基。优选的是NO束缚结构，因为它们可以允许通过NO裂解将最终产物一些有用的转化为有价值的化合物。在起始重氮化合物的-OR功能上存在双键时，CuCl / AgSbF ₆催化剂在环丙烷化反应中仅生成环丙基稠合的恶嗪烷/恶唑烷衍生物，而Rh ₂（OAc）₄催化剂通过CH插入主要生成异恶唑烷酮。