A new variant of Potato spindle tuber viroid (PSTVd) was detected for the first time from dahlia grown in Japan. The dahlia isolate of PSTVd formed a quasispecies and a major sequence variant consisting of 361 nucleotides in length, including five substitutions, three insertions, and one deletion, when compared to the intermediate strain from potato. In bioassays with the new isolate, Rutgers tomato developed mild stunting and leaf curling.

A precomplex of a chiral α,β‐unsaturated ester and a bulky aluminum oxide is crucial to setting the diastereoselectivity in the 1,4‐addition of a Grignard or organolithium reagent. This approach based on chiral recognition broadens the potential of the strategies relying on stoichiometric reagents.

Ein Präkomplex aus einem chiralen α,β‐ungesättigten Ester und einem sperrigen Aluminiumphenolat bestimmt die Diastereoselektivität bei der 1,4‐Addition von Grignard‐ oder Organolithiumverbindungen. Dieser auf enantioselektiver Erkennung beruhende Ansatz erweitert das Potenzial von Synthesen mit stöchiometrischen Reagentien.

Diastereoselective syntheses Diastereoselective syntheses O 0031Chiral Molecular Recognition by Aluminum Tris(2,6-diphenylphenoxide) in an Asymmetric 1,4-Addition. -The asymmetric conjugate addition of a variety of organolithium reagents to an auxiliary-bound cinnamate (II) is smoothly achieved by precomplexation with an aluminum tris(diarylphenoxide) and subsequent equilibration at low temperatures. The adducts are isolated after reductive removal of the ester group. A wide range of organolithium reagents can be added with excellent diastereoselectivities. A mixture of αand γ-adducts are obtained from prenyllithium (III), but the regioselectivity can be influenced by the nature of the aluminum complex as well as the nature of metal in the substrate. -(ITO, H.; NAGAHARA, T.; ISHIHARA, K.; SAITO*, S.; YAMAMOTO, H.; Angew.