Construction of cyclopentyl units by ring contraction reactions

Ruthenium (II) sulfoxides-catalyzed hydrogenolysis of glycols and epoxides

“…carbonyl compounds (Scheme 3). Existing precedents [19][20][21][38][39][40][41][42][43][44] and our initial findings suggest that two cyclic pathways (I and II) are viable, as shown in Scheme 3. We suggest the hydrogenative loss of one chloride ligand to generate L 4 RuHCl + HCl and the initial reaction proceeds through an ionic mechanism.…”

Síntese de indanos: uma seleção de métodos gerais e eficientes

“…O rearranjo oxidativo de moléculas contendo um carbociclo de seis membros pode ser uma estratégia interessante para a construção eficiente de indanos 25 . Como discutido a seguir, tálio(III) e iodo(III) são os dois oxidantes que foram utilizados com este propósito.…”

Hypervalent Iodine–Mediated Ring Contraction Reactions

“…Ring contraction reactions are an important method to increase molecular complexity in a single step, because, in several cases, the reorganization of the bonds occurs with a high level of selectivity, affording products not easily accessible by other approaches [1]. Ring contraction reactions can be effected by acids, by bases, by oxidizers or photochemically [1].…”

“…Ring contraction reactions can be effected by acids, by bases, by oxidizers or photochemically [1]. Among the oxidizers, one of the most used is thallium trinitrate (TTN) [2,3].…”