Suzuki-Miyaura cross-coupling reaction is an efficient and utilized method for the direct formation of carbon-carbon bonds. The effectiveness and efficiency of Suzuki-Miyaura cross-coupling reaction and its applications have been the topic of interest for synthetic chemists for the last few decades. Green chemistry is the area where we use eco-friendly products. Suzuki coupling includes palladium or nickel catalyzed coupling reaction, which involves ester of boric acids or simply boric acids with the organic halides or pseudohalide. In recent years, these catalytic systems have been developed in a green environment for Suzuki reaction (Suzuki-Miyaura cross-coupling reaction). This review epitomizes the Suzuki-Miyaura cross-coupling reaction using efficient catalysts in various green media.

A new-fangled, proficient, one-pot multi component, intramolecular C-S bond formation reaction, mediated by phase transfer catalyst, Triton-B, is described in this paper. The reaction of alkyl/ phenyl amines, CS2 and formaldehyde catalyzed via Triton-B resulted in formation of 3-(Alkyl or aryl methyl),5-(Alkyl or aryl methyl) substituted tetrahydro-2H-1,3,5-thiadiazine-2-thiones compounds(1a-15a). These compounds (1a-15a) were characterized with the help of elemental analysis, IR, NMR and mass spectroscopic methods. The PTC mediated reactions require mild reaction condition and reduced time period for completion. The reaction is achieved at normal temperature under solvent free conditions with good yields and great selectivity. This methodology discourages the traditional synthesis method of inorganic base for such coupling reaction.