Ring expansion isocyclics

Ring expansion of isocyclics by 1,1-dihalogenocyclopropane ring opening... 

N-Methoxycarbonyl-2-azabicyclo[3.1.0]hex-3-ene pyrolyzed during 0.5 hr. in the gas phase at 285° N-methoxycarbonyl-l,2-dihydropyridine. Y almost 100%. -This thermal isomerization proceeds faster than with isocyclic analogs. F. W. Fowler, Ang. Ch. 83, 147 (1971) ring expansion by ring opening s. a. T. Tsuji, H. Ishitobi, and H. Tanida, Bull. Chem. Soc. Japan 44, 2447 (1971). 

Reductive ring expansion of isocyclic carbinols by one C-atom... 

Triflic acid added dropwise over 30 min to a well-stirred, heterogeneous, mixture of 1-adamantanemethyl alcohol and NaBH4 t er at —78° under N2, warmed slowly to room temp., and stirred for 2h - product. Y 97%. F.e. and ring expansion of isocyclic carboxylic acids s. G.A. Olah et al., J. Org. Chem. 54, 1452-3 (1989). 

Lithium perchlorate calcium carbonate Ring expansion of isocyclic diol monotosylates Q)... 

Silver perchlorate Ring expansion of isocyclics by 1,1-dihalogenocyclopropane ring opening Cyclic 2 -alkoxy-a,) -ethylenehalides... 

Sodium hydride dimethyl sulfoxide Mono- and bi-cyclic isocyclics by cyclopropane ring expansion... 

Sodium hydroxide/methanol Syntheses wia cyclopropanol derivs Ring expansion of isocyclics... 

Isocyclic ring expansion by fiash vacuum pyrolysis 2H-Cycloheptal[b]furan-2-ones... 

---