Ring opening reactions regioselectivity

The regioselectivity of such nucleophilic ring-opening reactions can sometimes be... 

The regioselectivity of these ring opening reactions is sensitive to additional annelation on benzene (Table 7). In the tetralin derivative (59), little selectivity between type I and type II products is observed with either set of electrophilic reagents. A reversal of regioselectivity is observed in cyclobutabenzene and indan... 

Aziridines are well-known carbon electrophiles capable of reacting with various nucleophiles, and their ability to undergo regioselective ring-opening reactions... 

The two mono-formates are formed in comparable amounts, suggesting little regioselectivity in the oxirane ring opening reaction. Propylene carbonate, 1,2-propanediol, and formic acid were also found as reaction prod-... 

The chemoselectivity, regioselectivity, diastereoselectivity, and enantioselectivity of heteroatom oxidations, epoxidations and CH insertions by dioxiranes have been reviewed.26 The selective ring-opening reactions of epoxides at high pressures have been reviewed (in Japanese).27... 

Two classes of structures containing azido- and aziridino-hydroxyl-(3-lactam (I and II, respectively, Fig. 21) have been prepared by means of a stereo- and regioselective epoxide ring opening reaction [296],... 

With chiral catalyst 47d regioselective reductive ring opening reactions of racemic epoxides can be achieved, For alkynyl epoxy ethers it leads to effective asymmetric 5-exo cyclization of one radical, but reduction of the other [161, 162]. 

When BusSnSePh is allowed to react with epoxides in the presence of BF3-OEt2, the ring-opening reaction of epoxides proceeds with complete regioselectivity to afford the /3-hydroxy phenylselenides (Equation (99)). 

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