1992
DOI: 10.1002/ardp.19923251009
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Heterocyclische Spirocyclohexadienone, 1. Mitteilung

Abstract: Heterocyclic Spirocyclohexadienones, IThe compound formerly described as methylene amine 3 is in fact the heterocyclic spirocyclohexadienone 9. Contrary to literature, catalytic hydrogenation does not lead to methylamine 4 but to spiroketone 10 and a mixture of diastereomeric spirocyclic alcohols l l d l l b . The reactivity of 9 with protonic acids and carbonyl reagents is investigated.

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Cited by 6 publications
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“…The formation of spiroTB 4 can be explained similarly to the formation of acridines 2 (vide supra). Möhrle reported that compound 6 reacts with paraformaldehyde to give spiro compound 8 (Scheme ) . In analogy, naphthalen-2-amine itself would give compound 9 .…”
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confidence: 99%
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“…The formation of spiroTB 4 can be explained similarly to the formation of acridines 2 (vide supra). Möhrle reported that compound 6 reacts with paraformaldehyde to give spiro compound 8 (Scheme ) . In analogy, naphthalen-2-amine itself would give compound 9 .…”
mentioning
confidence: 99%
“…Mo ¨hrle reported that compound 6 reacts with paraformaldehyde to give spiro compound 8 (Scheme 2). 16 In analogy, naphthalen-2-amine itself would give compound 9. It is obvious that two NH groups of compound 9 can be linked by the next formaldehyde molecule (when used in excess) to give corresponding spiroTB 4a.…”
mentioning
confidence: 99%