3 research outputs found
β‑Aryl-α-nitro-α,β-enals as Heterodienes and Dienophiles
As demonstrated with the β-(2-furyl)-substituted
analogue <b>1b</b>, β-aryl-α-nitro-α,β-enals
(<b>1</b>) behave as heterodienes against enamines and enol
ethers
using their enal unit (e.g., <b>1b</b> → <b>12</b>). α-Nitro-α,β-enals can act as well as highly
reactive dienophiles to render adducts endowed with nitrogenated quaternary
centers (e.g., <b>1b</b> → <b>15a</b>). A hetero-Diels–Alder
(HDA)/Diels–Alder (DA) sequence from <b>1b</b> also proved
feasible on serial treatment with ethyl vinyl ether and Danishefsky’s
diene (<b>1b</b> → <b>14</b>)
β‑Aryl-α-nitro-α,β-enals as Heterodienes and Dienophiles
As demonstrated with the β-(2-furyl)-substituted
analogue <b>1b</b>, β-aryl-α-nitro-α,β-enals
(<b>1</b>) behave as heterodienes against enamines and enol
ethers
using their enal unit (e.g., <b>1b</b> → <b>12</b>). α-Nitro-α,β-enals can act as well as highly
reactive dienophiles to render adducts endowed with nitrogenated quaternary
centers (e.g., <b>1b</b> → <b>15a</b>). A hetero-Diels–Alder
(HDA)/Diels–Alder (DA) sequence from <b>1b</b> also proved
feasible on serial treatment with ethyl vinyl ether and Danishefsky’s
diene (<b>1b</b> → <b>14</b>)