Reduction of DDHQ and TCC esters by NaBH4-its specificity in the presence of Alkyl/Aryl esters
作者:Tirumalai R. Kasturi、Palle V.P. Pragnacharyulu
DOI:10.1016/s0040-4020(01)80451-8
日期:1992.1
DDHQ/TCC esters 3a–f, 7a–g were prepared either by oxidation of spiroketones 1 with DDQ/-chloranil or by condensation of acid chloride with DDHQ/TCC. NaBH4 reduction of unsaturated DDHQ 3a–b and TCC 7a–c esters gave the corresponding allylic alcohols in good yield without any observable 1,4-addition products. Reduction of saturated esters 3e, 7d, gave the corresponding alcohols. Alkylesters 5 and 6
Dispironaphthalenones and spironaphthalenones as novel dehydrogenation reagents
作者:Tirumalai R. Kasturi、Jitendra A. Sattigeri
DOI:10.1016/s0040-4020(01)88233-8
日期:1992.1
Dehydrogenation of a number of dihydroaromatic substrates has been carried out using either dispironaphthalenone 1 or spironaphthalenones 2 & 3 as dehydrogenating agents. The reaction is over in refluxing mesitylene in 1-2 hr and the yields of the aromatised products are fairly good (65-70%).
KASTURI, TIRUMALAI, R.;MADHUSUDHAN, REDDY, GOWRAVARAM;RAJU, GONIBELLA, J.+, J. CHEM. SOC. CHEM. COMMUN., 1984, N 11, 677