Essential Oil of Elsholtzia ciliata Hylander (3)

Terpenoids from Elsholtzia Species; II. Constituents of Essential Oil from a New Chemotype ofElsholtzia cristata

“…2-Isovaleryl-3-methylfuran (16) is also reported to be present in the essential oils of other Elsholtzia species like E. oldhami (3,8), E. ciliata (11)(12)(13), and the E. cristata (3,4) which differs in its oil composition from the one investigated here.…”

“…It showed mass spectral data and magnetic resonance characteristics in accord with those of dehydroelsholtzia ketone. (11)(12)(13), and E. densa (14), with its acylfuran structure representing a typical constituent of Elsholtzia species oils.…”

“…, substances found in appreciable amounts in other Elsholtzia species(1,11,12,(14)(15)(16)(17)(18), were detected. The monoterpenoid ether, 1,8-cineol(11), occurred in a fair amount of 0.13%.By means of mass chromatography of the characteristic sesquiterpene fragment ions, e.g.…”

A new synthesis of rosefuran.

“…In this radical addition reaction, the acyl radical, which %wasproduced from the aldehyde (1), added to the double bond of crotonaldehyde to form the ketone (2). Mehyl 4-oxo-5-methyl-6-formylhexanoate (2). A mixture of crotonaldehyde (7.0g, 0.1 mol) and benzoylperoxide (l.Og, 4mmol) was added dropwise under a nitrogen flow to stirred methyl 3-formylpropionate 15) (1 16g, 1.0 mol) at 95°C, and stirring of the mixture was continued for 6 hr at 95°C.…”

Carboxonium‐Ionen‐Reaktionen cyclischer Acetale, IX. Synthese von Rosenfuran und strukturverwandter terpenoider Ester, Alkohole und Olefine

“…119.5"C/8 Torr, ng = 1.4795. -'H-NMR (CC14): 6 = 0.67-1.07 (zwei t; 6H), 1.13-1.87 (m; 2H und rn; 2H und q, J = 7 Hz; 4H), 1.97 (zwei s; 3H und IH), 2.4-2.8 (m; 2H), 6.03 (breites s; 1 H), 7.07 (breites s; 1 H). -IR (kapillar): 3550,3460,2970,2930,2880,1625,1560,1510,1455,1380,1325,1290,1260,2225,1175,1145,1082,1040,1020,975,960,950,915,890,835,725,650,625,605,560,480,450 Liebigs Ann.…”