1: 3,4-dihydro-2H-pyran With tert.-butyl lithium in tetrahydrofuran T=-78 - 0°C; Metallation; 2: cyclo-(Me2SiO)3 T=-78 - 0°C; Substitution;

1: [2-(5,6-dihydro-4H-pyranyl)]dimethylsilanol With tetrabutyl ammonium fluoride in tetrahydrofuran T=20°C; desilylation; 2: 1-iodo-2-methylbenzene With bis(dibenzylideneacetone)-palladium(0) in tetrahydrofuran T=20°C; cross-coupling; 0.333333 h;