Среакциями. 1) с---coo-ch3 2) -ch-ch-

1. С + 2Н2 --> CH4

ch4 + cl2 --> ch3cl + hcl (на свету) 

ch3cl + koh (водный раствор) --> ch3oh + kcl

ch3oh + ch3cooh --> ch3-coo-ch3 + h2o

2. с2н4 + h2o --> c2h5oh

2 c2h5oh --> ch2-ch-ch-ch2 + 2h2o + h2

ch2-ch-ch-ch2 + 2h2 -->  ch3-ch2-ch2-ch3

2c4h10 + 13o2 --> 8co2 + 10h2o