Hoveyda–Grubbs catalysts Grubbs' catalyst

the second-generation hoveyda–grubbs catalysts can prepared 1st generation hoveyda–grubbs catalyst addition of nhc:

in 1 study water-soluble grubbs catalyst prepared attaching polyethylene glycol chain imidazolidine group. catalyst used in ring-closing metathesis reaction in water of diene carrying ammonium salt group making water-soluble well.

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^ cite error: named reference vougioukalakis invoked never defined (see page).
^ engle, keary m.; lu, gang; luo, shao-xiong; henling, lawrence m.; takase, michael k.; liu, peng; houk, k. n.; grubbs, robert h. (2015). origins of initiation rate differences in ruthenium olefin metathesis catalysts containing chelating benzylidenes . journal of american chemical society. 137 (17): 5782–5792. doi:10.1021/jacs.5b01144. 
^ hong, hyeok; grubbs, robert h. (2006). highly active water-soluble olefin metathesis catalyst . j. am. chem. soc. 128 (11): 3508–3509. doi:10.1021/ja058451c. pmid 16536510.