Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Krishna Gs Rao"'
Autor:
Kesavulu N Reddy, Krishna Gs Rao
Publikováno v:
ChemInform. 19
Cadalenequinone (I), a naturally occurring cadalenic sesquiterpene naphthoquinone was prepared by 2 routes, starting from the tetralones II (R = Me, H) respectively. The first route gave I in an overall poor yield. The second route affords I in good
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6d0b8e83d9eb4b563fa74479404c444
https://doi.org/10.1002/chin.198817309
https://doi.org/10.1002/chin.198817309
Autor:
M Sreenivasulu, Krishna Gs Rao
Publikováno v:
ChemInform. 19
Vilsmeier-Haack reaction of $R_7R_8C:C(R_9)C(OH)(R_{10})CHR_{11}R_{12} (R_7, R_9, R_{10}, R_{12} = H, Me$; $R_8 = Me, Et, Pr, H$; $R_{11} = H, Me, Et)$ gave 6-26% benzenes I $(R_1 = CHO$; $R_2, R_4, R_6 = H, Me$; $R_3 = Me, CHO$; $R_5 = H, Me, Et, CH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07636fa1cb222587037c44ce6278d11b
https://doi.org/10.1002/chin.198826135
https://doi.org/10.1002/chin.198826135
Publikováno v:
ChemInform. 18
Vilsmeier reactions of 4 hexenols, HOCHMeCMe:CHMe, and 3-methyl-2,5-cyclohexadiene-1-carboxylic acid give 22-35% uvitaldehyde.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fd5dd139630dd312e3190c4ad4db3bf
https://doi.org/10.1002/chin.198733152
https://doi.org/10.1002/chin.198733152
Autor:
B Raju, Krishna Gs Rao
Publikováno v:
ChemInform. 19
Synthesis of 5-chloro-2,2,4,6-tetramethylindane (I) is described. 2,2-Dimethylation of the known indanone II, followed by reduction gives trimethylindane III. Birch reduction of III and subsequent acid hydrolysis leads to a mixture of $\alpha$, $\bet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b201d6896fd8d2911103d3b15e7fb6d
https://doi.org/10.1002/chin.198825321
https://doi.org/10.1002/chin.198825321
Autor:
M Sreenivasulu, Krishna Gs Rao
Publikováno v:
ChemInform. 20
Vilsmeier reaction (POCl3, Me2NHCHO) of alkylidenemalononitriles gives the title compds. by in situ generation of an aldehyde equiv. followed by cyclization. E.g., PrCH:C(CN)2 gives 19% chloroethylnicotinonitrile I.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bdb51428fa40e41c44c2b5a66aa03288
https://doi.org/10.1002/chin.198944217
https://doi.org/10.1002/chin.198944217
Autor:
Krishna Gs Rao, R Sangaiah
Publikováno v:
ChemInform. 18
$p-RC_6H_4CHMeCH_2COCH_2CHMe_2$ (I; R=CHO) was prepared from chiral I CR=Me) by oxidation to I $(R=CO_2H)$, reduction to I $(R=CH_2OH)$, and oxidation to I (R=CHO).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb0be1633196ecefde0d6b0ae936340f
https://doi.org/10.1002/chin.198743310
https://doi.org/10.1002/chin.198743310
Autor:
Krishna Gs Rao, B Raju
Publikováno v:
ChemInform. 18
Vilsmeier reactions of $RR_1C:CHCR_2:CHCO_2H$ $[I, R=R_2=H, R_1=Me,Et; RR_1=(CH_2)_5]$ give 15-42% isophthalaldehyde derivatives with poor selectivity. I $(R-R_2=Me)$, however, gives 45% 3,5-xylenol and 6% $2,4,6-Me_2(HO)C_6H_2CHO$.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81e07a91c43c445add612a4a004b7c9e
https://doi.org/10.1002/chin.198733153
https://doi.org/10.1002/chin.198733153
Autor:
Krishna Gs Rao, B Raju
Publikováno v:
ChemInform. 18
Chloride I $(R=Cl, R_1=CMe_3)$, obtained from $2,4-Me_2C_6H_3OH$, was converted into the cyanomethylphenols I $(R=cyano, R_1=H, CMe_3)$ depending on the experimental conditions and both gave I $(R=CO_2H, R_1=H)$. I $(R=CO_2H, R_1 =H)$ gave I $(R=CO_2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::560f88e49293340bb98db6b391e0d223
https://doi.org/10.1002/chin.198747161
https://doi.org/10.1002/chin.198747161
Autor:
D Murali, Krishna Gs Rao
Publikováno v:
ChemInform. 19
Substituted 1-naphthols I $(R_1-R_4=H$; $R_1=Me, R_2-R_4=H$; $R_1=R_2=R_4=H, R_3=Me, OMe$; $R_1-R_3=H, R_4=OMe$; $R_1=R_3=R_4=H, R_2=OMe$; etc.) were oxidized by $PhIO_2$ to afford a mixture of 1,2- and 1,4-naphthoquinones II and III. Similar oxidati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46fc919e94a2129c5767d6fad42b23a5
https://doi.org/10.1002/chin.198805151
https://doi.org/10.1002/chin.198805151