ChemInform Abstract: Fluorine‐Containing 2‐Ethoxy‐2H‐5,6‐dihydropyrans.

Abstract

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Hyperbaric reactions in organic synthesis. Progress from 2006 to 2021

“…Despite convincing data regarding the dominant role of high pressure in a previous paper, 78 there are reports expressing the possibility, in general, of carrying out the same transformations with only thermal activation. For example, the interaction of highly reactive hexafluoroacetone 79 or 2-oxocyanoacetic acid ethyl ester 80 with 1-ethoxybuta-1,3-diene ( 104 , R 2 = H) led to similar pyrans in high yields, even at r.t.…”

Regiochemistry of Diels-Alder reaction of hexafluorothioacetone and dienes

“…Fluorinated thioaldehydes R f CH=S (R f =H(CF 2 ) 2 -, H(CF 2 ) 4 -) 3 were reported to react with 2-ethoxybutadiene-1 with the formation of two regioisomers [8], while the reaction of fluorinated aldehydes of similar structure with 2-ethoxybutadiene-1,3 led to highly selective formation of a single regioisomer [9].…”