Synthesis of regioisomeric (S)-(+)-3,3,4-trimethyl-8-methoxy-3,4-dihydrobenzo[h]-isoquinolin-1(2H)-one and (S)-(+)-1,2,2-trimethyl-8-methoxy-1,2-dihydrobenzo[f]-isoquinolin-4(3H)-one by the Ritter reaction
摘要:
The conservation of chirality at the alpha-position to the carbocationic centre of (S)-(-)-2-methyl-3-(6-methoxynaphth-2-yl)butan-2-ol and the formation of regioisomeric (S)-(+)-1,2,2-trimethyl-8-methoxy-1,2-dihydrobenzo[f]isoquinolin-4(3H)-one were found in the synthesis of (S)-(+)-3,3,4-trimethyl-8-methoxy-3,4-dihydrobenzo[h]isoquinolin-1(2H)-one by the Ritter reaction.
Sulfuric Acid Adsorbed on Silica Gel. A Multipurpose Acid Catalyst
作者:Flavio Chávez、Silvia Suárez、Miguel A. Díaz
DOI:10.1080/00397919408019058
日期:1994.8
ketones to 1,3-dioxolanes and their hydrolysis, α,β-unsaturated ketones to enol ethers, and alcohols to methyl-methoxyethyl ethers are performed efficiently in high yield with sulfuric acid adsorbed on silicagel as catalyst.
Metal catalyst-free photo-induced alkyl C–O bond borylation
作者:Guobin Ma、Changzhou Chen、Sangita Talukdar、Xinluo Zhao、Chuanhu Lei、Hegui Gong
DOI:10.1039/d0cc04776g
日期:——
Metal catalyst free, blue visible light-induced C–O bond borylation of unactivated tertiary alkyl methyl oxalates has been developed to furnish tertiary alkyl boronates. From the secondary alcohols activated with imidazolylthionyl, moderate yields of boronates were attained under standard photo-induced conditions. Preliminary mechanisticstudies confirmed the involvement of a (DMF)2–B2cat2 adduct that