Radicaldediazoniation of o-(2-propenyloxy)- and o-(2-propynyloxy)benzenediazoniumions in the presence of β-cyclodextrin gives selectively dihydrobenzofurans under N2, while hydroxymethylated dihydrobenzofurans and 3-hydroxymethyl-benzofuran under air, respectively.
Apparent 6‐
<i>endo‐</i>
trig Carbofluorination of Alkenes Enabled by Palladium‐Based Dyotropic Rearrangement
作者:Jing Gong、Qian Wang、Jieping Zhu
DOI:10.1002/anie.202211470
日期:2022.12.12
cyclization mode. Pd-catalyzed cyclization of 2-(2-alkylallyloxy)phenylboronic acid derivatives in the presence of Selectfluor 2 provides chromanes 3 with concurrent generation of a tertiary alkylfluoride function. A 5-exo-trig carbopalladation affords PdII intermediate A whose oxidation to PdIV followed by 1,2-aryl/PdIV dyotropic rearrangement and C−F bond-forming reductive elimination affords chromane
Ni-Catalyzed Oxygen Transfer from N<sub>2</sub>O onto sp<sup>3</sup>-Hybridized Carbons
作者:Shengyang Ni、Franck Le Vaillant、Ana Mateos-Calbet、Ruben Martin、Josep Cornella
DOI:10.1021/jacs.2c06227
日期:2022.10.12
SYNTHESIS OF METHYL (<i>E</i>)-4-[2-(2,3-DIHYDRO-3-METHYL-3-HYDROXYMETHYLBENZO[<i>b</i>]THIEN-5-YL)-1-PROPENYL]BENZOATE [(<i>E</i>)-3], METHYL (E)-4-[2-(2,3-DIHYDRO-3-METHYL-3-HYDROXYMETHYL-5-BENZOFURANYL)-1-PROPENYL] BENZOATE [(<i>E</i>)-4], AND METHYL (<i>E</i>)-4-[2-(2,3-DIHYDRO-3,3-DIMETHYL-5-BENZOFURANYL)-3-HYDROXY-1-PROPENYL]BENZOATE [(<i>E</i>)-7] AS POTENTIAL METABOLITES OF SELECTED HETEROAROTINOIDS WITH FUSED FIVE-MEMBERED RINGS
作者:Jonathan B. Gale、Jozef Klucik、Shankar Subramanian、K. Darrell Berlin
DOI:10.1080/00304940109356616
日期:2001.10
SYNTHESIS OF METHYL (E)-4-[ 2-(2,3-DIHYDRO-3-METHYL-3-HY DROXYMETHYLBENZO[b]THIEN-5-Y L)-1-PROPENYLIBENZOATE [(E)-3], METHYL (E)-4-[2-(2,3DIHYDRO-3-METHYL-3-HYDROXY METHYL-5-BENZOFURANY L)-1 -PROPENYL] BENZOATE [(E)-4], AND M E T H n (E)-4-[2-(2J-D~RO-33-DIMETWL-5-BENZOFURANYL)-3-HYDROXY-l-PROPENYLJBENZOATE [(E)-7] AS POTENTIALMETABOLITES OF SELECTED HETEROAROTINOIDS WITH FUSED FIVEMEMBERED RINGS