Chapter 7 - [4 + 2] Annulation of Activated o-Toluate/o-Tolualdehyde Donors (Hauser-Leusen Annulation)

Add time:08/30/2019    Source:sciencedirect.com

This chapter deals with [4 + 2] anionic annulation of activated ortho toluates and ortho tolualdehydes. The activating groups belong to esters, cyanide, nitro, sulfones, sulfoxides, thioacetals, etc. Based on the activating groups, the annulations have been subclassified as the “Schmid annulation” and the “Hauser-Leusen annulation”. The Schmid annulation involves ester activated toluates whereas the Hauser-Leusen annulation encompasses sulfoxide- and sulfone-activated toluates. Their reactions include acceptors like acrylates, allenecarboxylates, vinyl ketones, nitroalkenes, etc. providing an access to substituted naphthalenes with defined patterns of the substituents. The Hauser-Leusen annulation has proved useful in the total synthesis of natural products.

We also recommend Trading Suppliers and Manufacturers of TOLUALDEHYDES (cas 1334-78-7). Pls Click Website Link as below: cas 1334-78-7 suppliers

Prev:Original ArticleValidated high-performance thin-layer chromatographic (HPTLC) method for simultaneous determination of nadifloxacin, mometasone furoate, and miconazole nitrate cream using fractional factorial design
Next:Direct synthesis of anthracenes from o-TOLUALDEHYDES (cas 1334-78-7) and aryl iodides through Pd(II)-Catalyzed sp3 CH arylation and electrophilic aromatic cyclization)