Saalfrank, Rolf W.’s team published research in Chemische Berichte in 126 | CAS: 27943-46-0

Saalfrank, Rolf W. published the artcile1,3-Donor/donor-substituted allenes. VII. Allenecarboxanilides by transannulation or [2.3]/[3.3]-sigmatropic rearrangements – building blocks with versatile intra- and intermolecular synthetic potential, Related Products of tetrahydropyran, the publication is Chemische Berichte (1993), 126(3), 823-35, database is CAplus.

The reaction of 1,3-bis(alkylarylamino)-1,3-diethoxyallenes with disubstituted malonyl chlorides leads to N,N’-dialkyl-N,N’-diarylallene-1,1-dicarboxamides and 2H-pyran-2,4(3H)-diones, with a transallenation reaction being favored in the case of EtO(MePhN)C:C:C(NPhMe)OEt. Thermal tandem cyclization of (MePhNCO)₂C:C:C(C₆H₄CMe₃-4)₂ via 2-quinolone affords phenanthridone I. Thermally induced cyclization of the pyrandiones leads to 4-quinolones. 4-RC₆H₄SO₂CMe₂CCCONPh₂ (R = H, Me), on heating undergoes a [2,3]-sigmatropic rearrangement to 4-RC₆H₄SO₂C(CONPh₂):C:CMe₂. Reaction of HOCR¹₂CCCONPh₂ [II, R¹ = Me; R¹₂ = (CH₂)₅] with sulfenyl chlorides or chlorophosphines, followed by [2,3]-sigmatropic shift, affords N-phenyl-1-sulfinyl- and N-phenyl-1-phosphorylallene-1-carboxanilides, resp. Alkynyl ketene acetal intermediates are formed from II and orthoesters. Spontaneous [3,3]-sigmatropic rearrangement then gives N-phenylallene-1-carboxanilides. Intramol. Diels-Alder reaction of the allenecarboxanilides gives [2.2.2]bicycles.

Chemische Berichte published new progress about 27943-46-0. 27943-46-0 belongs to tetrahydropyran, auxiliary class Tetrahydropyran,Alkynyl,Ether, name is 2-((2-Methylbut-3-yn-2-yl)oxy)tetrahydro-2H-pyran, and the molecular formula is C10H16O2, Related Products of tetrahydropyran.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics