Analyzing the synthesis route of 3400-55-3

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Synthetic Route of C7H15BrO2. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 2-Bromopriopionaldehydediethylacetal, is researched, Molecular C7H15BrO2, CAS is 3400-55-3, about A modified Bischler synthesis of some tetracyclic indole derivatives.

Indoles I (RR1 = CH:CH, X = H2, CH2CH2, CH:CH, S) were obtained in 69-83% yield by cyclizing I (R = CH2CHO, R1 = H) on a mol. sieve. I (R = CH2CHO, R1 = H) were obtained by treating I (R = R1 = H) with BrCH2CH(OEt)2 and hydrolyzing I [R = CH2CH(OEt)2, R1 = H] with 4-MeC6H4SO3H. I (R = CH2CHO, R1 = H, X = bond) did not cyclize but dimerized.

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics