... 9a The reaction has also been reported to occur catalytically, using RuCl 3 /PBu 3 in the presence of propynyl alcohols as water scavengers (at 120−140 °C and 50 atm of CO 2 ) 12 or Ph 3 SbO/P 4 S 10 in the absence of dehydrating agents (at 80−150 ... 12, KCl f, dioxane, 80, 2, 0 ...
![2H,2'H-2,2'-ethane-1,2-diylidene-bis-benzo[1,4]oxazine Structure](https://image.chemsrc.com/caspic/345/55879-76-0.png)
![2-[2-(3,4-dihydro-2H-1,4-benzoxazin-2-yl)ethyl]-3,4-dihydro-2H-1,4-benzoxazine Structure](https://image.chemsrc.com/caspic/307/55879-77-1.png)