Dialkoxyphthalocyaninosilicon Derivatives^1a

New method for the synthesis of (3R,7R)-hexahydrofarnesyl bromide based on the microwave-activated regioselective enolization of homochiral phytone

“…Under reflux of ketone 1 with Ac 2 O/AcOK, 20 Ac 2 O/ NEt 3 , 20 or Ac 2 O/TMSCl/NaI, 21 acetate of the corre sponding enol was not formed. The desired ∆ 2,3 enol ace tates 3 (a mixture of E and Z isomers) were successfully obtained by the reflux (7 h) of ketone 1 with acetic anhy dride in the presence of TsOH•H 2 O, 22 here, the other ∆ 1,2 isomer was not formed. In this case, the conversion of ketone 1 was 49%.…”

Synthesis of silicon tetrapyrazinoporphyrazines

“…by fluoride ions or by using the reaction of 1,3-diiminoisoindolines with trichloroorganosilanes RSiCl 3 [22][23][24]. by fluoride ions or by using the reaction of 1,3-diiminoisoindolines with trichloroorganosilanes RSiCl 3 [22][23][24].…”

Synthesis and some spectroscopic properties of tetra-2,3-pyridoporphyrazinatosilicon involving bulky axial ligands

“…The compound 5 was insoluble in most of the common organic solvents. A suspension of 5 in dry pyridine was treated with excess tri(n-hexyl)chlorosilane under reflux to afford 1 [1,2,4,5]. Compound 2 was synthesized via the same route but with the use of octanoyl chloride in place of tri(nhexyl)chlorosilane.…”

“…In this respect, silicon phthalocyanines (SiPcs) with two axial ligands have several advantages over other metallophthalocyanines (MPcs). By introducing bulky axial ligands, the solubility problem is easily solved [1,2] and it is possible to collect data on monomeric Pcs, which are important in understanding the nature of Pc itself. However, SiPc analogues containing heteroatoms in the Pc core are scarce, except for one recent report on tetra-2,3-pyrazinoporphyrazines (SiPyZs) [3].…”