Formal [4+2] cycloadditions between enones and dienophiles catalysed by DHQNA, and plausible reaction pathway.
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![Formal [4+2] cycloadditions between enones and dienophiles catalysed by DHQNA, and plausible reaction pathway.](https://rsc.silverchair-cdn.com/rsc/content_public/books/632/parts/bk9781782626411-00001/7/bk9781782626411-00001-s32_hi-res.gif?Expires=1716522645&Signature=4LqZbvJXqpeOkQwWLFsv7KeemDlB64NibJLVY-qzo9Jwj70vaCJfEfdQjk~jKjNZLeRPvsL4Oi0c4bpdSvWTpiO4Zf7mZvy8fMc32IdNTBE4rWLECV5uFnw8L-LB6k948W0UXF3r1gK~FiB1wF2QalXT6XijrsSyu~ypxpY8741vT005ESfMDQMeyktO5jlGG-asy-wrAiGAeDRJGltblFlTI9fMXHSOBP99Lb2EcJhfRIp~qWmxZPjbT5-khubRRPA2SIzEFhKl-NnvfSzkREUx85T256uS1-ifkq28MKyw-qS~WpAsRg4Yh-Jjo2F5cBgDfPKxigHgzBy0VNDXTg__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
