An article A new mode of cyclobutenedione ring opening for the synthesis of 2-oxobut-3-enamides and tetrasubstituted furans WOS:000649672200001 published article about GENERAL REGIOSPECIFIC SYNTHESIS; SQUARIC ACID; SUBSTITUTED QUINONES; PROTECTING-GROUP; REARRANGEMENTS; 4-ALLYLCYCLOBUTENONES; HYDROXYQUINONES; TRANSFORMATION; CHEMISTRY; EXPANSION in [Bennett, Ryan M.; Sun, Wei; Wilson, Dharyl C.; Light, Mark E.; Harrowven, David C.] Univ Southampton, Chem, Southampton SO17 1BJ, Hants, England in 2021.0, Cited 77.0. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5. SDS of cas: 123-11-5
A dichotomy between the additions of organolithiums and lithium amides to cyclobutenediones is described wherein the former give carbonyl addition products while the latter induce ring opening by enone cleavage via O- to C-lithium transfer. This distinct mode of ring scission gives access to 2-oxobut-3-enamides and tetrasubstituted furans.
About 4-Methoxybenzaldehyde, If you have any questions, you can contact Bennett, RM; Sun, W; Wilson, DC; Light, ME; Harrowven, DC or concate me.. SDS of cas: 123-11-5
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles