Regio-stereoselective

Potassium Alkoxides. The most widely used potassium bases are potassium tert-hu. oAde [865-47-4] (KTB) and potassium / i -amylate [41233-93-6] (KTA). These strong alkoxide bases offer such advantages as base strength (pX = 18), solubiUty (Table 5), regio/stereoselectivity because of bulky alkyl groups, and stabiUty because of the lack of a-protons. On storage, KTB and KTA have long shelf Hves under inert atmosphere (see... 

Dioxacyclic compounds have also been shown by Lautens and Fillion to undergo regio-, stereoselective and sequential ring opening, Scheme 13 [216]. Whereas reaction of the dioxacyclic compound at 0 °C led to incorporation of... 

A high degree of chemo-, regio-, stereoselectivity is very important... 

The range of olefins screened in platinum-catalyzed hydroformylation is rather narrow. As seen already above, mostly styrene or 1-olefins were investigated in mechanistic studies with the aim of establishing the structure of catalytic intermediates or to find structure-activity-regio/stereoselectivity relationships. Usually, Pt/Sn catalysts operate under rather mild conditions (10-100 bar syngas, 50-130 °C) [53]. Pt/S ratios of up to 2000 1 have been realized. 

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