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Zhang, Yueteng ; Ji, Peng ; Meng, Xiang , et al. Molecules,2021,26(12):3617. DOI: 10.3390/molecules26123617 PubMed ID: 34204782
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Abstract: A simple arylamine-catalyzed Mannich-cyclization cascade reaction was developed for facile synthesis of substituted 2H-benzo[h]chromenes, e.g., I (R1 = Ph, 2-MeOC6H4, furan-2-yl, 2-bromopyridin-3-yl, etc.; R2 = H, Cl, O2N, AcNH, etc.). The notable feature of the process includes the efficient generation of ortho-quinone methides (o-QMs) catalyzed by o-phenylenediamine. The mild reaction conditions allows for a broad spectrum of 1- and 2-naphthols and trans-cinnamaldehydes R1CH:CHCHO to engage in the cascade sequence with high efficiency.
Keywords: aminocatalysis ; cascade reaction ; chromenes ; organocatalysis ; quinone methide
Purchased from AmBeed: 107-86-8 ; 123486-66-8
CAS No. : | 107-86-8 | MDL No. : | MFCD00010291 |
Formula : | C5H8O | Boiling Point : | - |
Linear Structure Formula : | HOCCHC(CH3)2 | InChI Key : | SEPQTYODOKLVSB-UHFFFAOYSA-N |
M.W : | 84.12 | Pubchem ID : | 61020 |
Synonyms : |
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Signal Word: | Danger | Class: | 8,3 |
Precautionary Statements: | P210-P233-P240-P241-P242-P243-P261-P264-P270-P271-P272-P273-P280-P301+P312+P330-P301+P330+P331-P303+P361+P353-P304+P340+P310-P305+P351+P338+P310-P312-P333+P313-P362+P364-P370+P378-P403+P233-P403+P235-P405-P501 | UN#: | 2920 |
Hazard Statements: | H226-H302-H313-H314-H317-H331-H402 | Packing Group: | Ⅱ |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.