Catalytic cyclopropanation with transition metal salts of soluble polyethylene carboxylates

2,5-Dimethylhexa-2,4-diene

“…2,5-Dimethylhexa-2,4-diene undergoes copper(II)-catalyzed aminohydroxylation reactions with N-sulfonyl oxaziridines in a good yield with no observable N,Oregioisomers (eq 12). 38 NaBH 4 , (MeO) 2 …”

Recent Advances in Synthesis of Cyclopropanes

“…Alkenylboronic esters 101,102 , N-silylated allylamines 171 and acetylenes 172,173 are successfully cyclopropanated with diazocarbonyl compounds under catalysis of one of those metal derivatives. Newly developed metallic catalysts for diazoacetic esters include polymer-bound, quantitatively recoverable Rh(II) carboxylate salts 174 186 . The stereochemical integrity of the alkenes, however, may not be retained.…”

Ruthenium‐Catalyzed Cyclopropanation

“…Ru 3 (CO) 12 showed the catalytic activity for styrene and EDA at 60 C [20]. In addition, Ru 2 (OAc) 4 [21], Ru-polyethylene carboxylates [22], ruthenacarborane clusters [23], Ru 2 (CO) 4 (l-OAc) 2 / n [24], and RuCl 2 (Ph 3 P) 3 [25] catalyzed the cyclopropanation at 60~100 C to give moderate to higher yields and 60:40 to 70:30 ratios of the trans:cis isomers.…”