Indole-3-ethanol plants

The Diabrotica spp. com rootworm beetles are specifically attracted to a variety of plant-produced phenylpropanoids, eg, ( )-cinnamaldehyde [14371-10-9] for the southern com rootworm D. undecimpunctata howardr, ( )-cinnamyl alcohol [4407-36-7] for the northern com rootworm D. barberi and indole [120-72-9] for the western com rootworm, D. virgifera virgifera. Especially powerflil lures for these rootworm beetles are 2-(4-methoxyphenyl)ethanol for the northern com rootworm and 4-methoxycinnamaldehyde [71277-11-7] (177) for the western com bootworm. 

Among the many alkaloids of Rhazya stricta (see Table I), the structure of the alkaloid rhazinine remains to be determined (197). This indolic base, C19H24N2O, contains a primary alcoholic group but, unlike akuammidine (CCCXXII) which accompanies it in the plant, it contains no G-methyl (197). Other alkaloids of the same plant include rhazidine, C20H26N2O3, H20, mp 278-279°, [[Pg.505]

The basic fraction of the ethanolic leaf extract of the Malaysian plant Kopsia griffithii exhibits a strong antileishmania activity. One of the two novel alkaloids isolated from this plant in 1998 was the indolizidino[8,7-fo]indole harmicine [17]. Synthetic approaches to harmicine became attractive owing to its pharmacological potential [18,19]. We applied our three-step pyrrolidine annulation strategy to the synthesis of harmicine (Scheme 15.5) [19]. 

Internal auxins of plants, other than lAA, are also known, and include indole-3-ethanol (lEt), indole-3-aldehyde, indole-3-carboxylic acid, and indole-3-acetonitrile (IAN) [3]. 

A tryptophol oxidase similar to the cucumber enzymes was recently isolated from the mold Phycomyces blakesleeanus [36]. The demonstrated occurrence of lAA-sensitive tryptophol oxidases in a fungus and a higher plant strongly suggests that enzymes of this kind may be widely distributed. In fact, even the microorganism Arthrobacter responded to tryptophol feeding by formation of a distinct oxidase. This oxidase could also be induced by indoleacetaldehyde, but by no other indoles and, notably, not by aliphatic alcohols such as ethanol [21]. 

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